As for finding - and now not finding - some rarities, here's another. Before the FSS:
After the FSS:
Now you can't tell from the barcode that there's something out of the ordinary in there. I was at 55,000 systems discovered at the time IIRC, and to find it now would require me to fully scan every system: doing that many is not something I would wish on anyone.
From the barcode? No. But I've found that binary+ planets like that stick out like a sore thumb during my initial sweep of a system. Furthermore, in pancake mode, with its
working (fix the VR part of your game, Frontier!) orbital lines, I would be able to determine the overall heirarchy simply resolving one or two bodies of that quintary world. Granted, it can never compete with holding down a button for five seconds, but pre-FSS finding that kind of thing would've kind of a "eh" moment for me. Post FSS, that's the kind of thing which makes me immediately exit the FSS and head out to take a closer look, while keeping an eagle eye out for any other bodies in the system that I can visit either on the way or afterwards.
It's that whole "feeling of discovery" I've always talked about. For me, the old ADS system was so anti-"feeling of discovery" that I didn't explore in a game where I'd looked forward to being able to explore the galaxy ever since the Kickstarter. Post FSS, I'm kind of pacing myself to arrive in Colonia when the "New Era" drops so I can pick up any
new exploration equipment
and then head right back out into the black.
edit:
Ozric touched on this before, a major flaw in the exploration mechanic is the singular sequential way in which we are goaded to explore. There could be tools to assist explorers in their parallaxing ways, other tools would be used for those who are completionists (the FSS fits that role), other tools for those who look for anomalies, and again other tools for more scientific explorers who really want to get stuck in data. Look at the loadouts for those who enjoy combat. There is a meta, but CMDRs have preferences, or get creative in combinations of equipment. Most explorer loadouts look very similar, and the only part where they differ is in sizes and engineering. Explorers have very few degrees of freedom to work with.
Given the heavy dose of parallax discovery in my style, I've found that the FSS to be quite the handy tool when I'm in the mood for some proper parallax exploration. Which is a big part of why I still like the FSS. It's such a flexible exploration tool in my experience... and it would be even
more flexible if Frontier would get rid of that lousy, artificial, and completely unnecessary "you must throttle down to use it" restriction.
edit the second:
The problem with parallaxing would in my opinion be mostly the question of reward, time invested, and frequency. You'd have to spend a considerable amount of time in every system (but this could be negated by the scanner telling you whether there is something beyond its range or not!), only to find out that most of the time, you ended up with a few smaller stars, orbited by the usual barren planets.
Same also goes for the FSS, by the way. Although it's not the intended primary usage, if you were to fully scan every system, you'd have to spend a considerable amount of time, only to find out that most of the time, you ended up with yet another system with common bodies in common configurations, and the like. This is because the galaxy is as it is, and as it should be.
This is also why I tend to say that the main mechanic of exploration shouldn't be data logging of bodies.
Again, speaking personally, the main reason why my exploration style includes some parallax discovery (and sometimes doing entire systems that way for the lols) is for the reward.
For me, that reward isn't credits. I've got 375 million credits in the bank, a billion in assets, and EDSM's current estimate of my exploration data is another three billion... which I believe doesn't include all the worlds I've mapped, from tiny icy worlds with interesting geology, to mighty life bearing gas giants I've mapped because I'm hoping some other explorer will see my tag, and it'll keep them up at night wondering who in their right mind would their time on it?
That reward isn't "discoverd by" or "mapped by" tags either. I'm sure 99% of the systems where I've gotten "first" tags on will never be visited by another player, and I'm fine with someone else getting something I consider of dubious value.
My reward is that "feeling of discovery," that moment where you see a bright point of light moving against the starry background, and you realize that you're looking at an alien world. That's what's keeping me out here, when real life gives me an opportunity to play. If it wasn't, I'd be Buckyballing it Back to the Bubble, once again making making life difficult for the Evil Galactic Federation, and its ruling corporate oligarchy, and spreading the light of freedom and prosperity across human space, and beyond!