And I've seen the pictures of the repeating geology (which I assume is what you mean by "tiling") in ED 4.0, and I found it off-putting. Now if you're saying you've been lucky and never encounter that yourself while playing the game, that's one thing
There's multiple sorts of repeats, some of which are easier to accept than others (and some of which Horizons surfaces had, which Odyssey doesn't), and some of which were worse in the earlier days of Odyssey but are fixed now.
The ones which tended to show up on the early screenshots were the large-planetary-scale repeats: the same continent-sized terrain feature visible twice (or more) on a planet. The adjustment of planetary colours has made these a lot less obvious than they were - though the surface scan makes them a bit more obvious again if you get (un)lucky with where it's threshold line for geo/bio signals ends up, and that can also expose other patterns on that scale. I don't tend to see these in practice nowadays in general - though there are a couple of planets which I've happened to map and also have stations I visit where it's still pretty obvious. That my style of play doesn't spend masses of time looking at planets in the kind of mid-altitude slow orbit which really highlighted the original problem helps for me, of course.
The other one which is really obvious for me is actually an area where on a technical level Odyssey is
much less repetitive than Horizons - the rock scatter. Rock scatter in Horizons had a well-measured (and not particularly large) repeating template, but wasn't that noticeable from most flight altitudes and speeds (too small) or from surface level (too close). In Odyssey, the rock scatter randomness is
way higher, the rocks generally appear in more geologically sound places (accumulated at the bottom of valleys, not many on the crests of hills, for example) and there are tens of times more different types of rock. Unfortunately, the Sandwich Rock shows up far too often for how visually distinctive it is. And it's a nice rock! Someone clearly put a lot of effort into it! It's just a bit weird if you can see more than one of them at once in a way that seeing ten identical vaguely egg-shaped rocks isn't.
In theory the surface terrain when viewed from the surface is also repetitive - that mountain there, is a copy of a mountain you can find on another planet too, or maybe even elsewhere on this planet. It might actually be an interesting exploration challenge to go and find them - I certainly don't recall seeing an actual example myself, but others will do a lot more surface exploration and could. Especially if it's a Sandwich Rock level of interesting in the first place.
On the other hand, Horizons surfaces were also sometimes very repetitive - if you were on a "smooth and flat" bit of the planet - which was "most of it" on the higher-G worlds - the SRV-scale terrain had two types: actually completely flat except for the scatter rocks, or some small disconnected hills. And those might have been galactically unique disconnected hills - I wasn't getting out the theodolites for each one - but they were pretty repetitive nonetheless. For driving around and viewing the planet from that perspective, I almost always think Odyssey is better than Horizons...
...with the exception of craters. Odyssey completely lacks the mid-sized craters (or I've been really unlucky) - the ones maybe 25-50km radius, central mound, etc. Those gave some of the most fun terrain for Horizons driving and are just completely missing in Odyssey. That's not even a repetition issue - template up ten of those craters, and with rescaling, rotation, different lighting, overlap of other smaller-scale templates on them anyway, and I'm not going to notice. It's just that they're not there at all.
It's one of those things where whether you find the Horizons repetition or the Odyssey repetition "worse" is likely entirely down to personal taste and what scales you explore at.
But then, the basic ED 1.0 generation of systems has plenty of repetition at certain levels: cube density varies (in a famously visible way with E-cubes near the core) in a moderately predictable fashion ... the exact details may be different but how many systems where the order out from the star is "Star -> A belt -> 3 HMCs -> B belt -> Gas Giants -> one Iceball" have you seen? ... the way temperature is calculated means that you always get small rocky moons inner to small icy moons for gas giants, and other fairly static progressions, even though the ordering in "real" star systems can be much more diverse.
It's an unavoidable problem with having enough volume to fill that it needs heavy procgen to fill it. Too random, and people will complain it's nonsensical (and Horizons terrain was certainly geologically implausible at times) - too patterned (even if technically all the numbers are random and unique), and the repetition or at least component repetition gets obvious. And the thresholds are different for different people so on an aggregate level there's always going to be complaints about both. At some point you just have to accept that the key gameplay innovation of Odyssey is the ability to go on holiday with your friend Sandwich Rock and take photos of the cool places you visit together.