Hey, here comes an update! What prompted me to do it was today's video that answered colonization questions. Especially the part where they said that the thing about colonization also being an activity for explorers is that they'll be the ones who find the locations for those "mini-bubbles". Let's take a look at the numbers then. (By the way, the results are basically the same as 2.5 years ago - with lower exploration activity, that's no surprise.)
The best case scenario is that currently, the closest undiscovered system would at best be somewhere around 500 ly from Sol, and it would be a cold, low-mass star system around a brown dwarf star. With the currently stated 10 ly colonization range, even in the best case it would be a year before players colonize a currently-undiscovered system, assuming they can sustain a top speed of one week per system. However, as I talked about in the first post, the more realistic assumption is that it'd be 2-2.5x the distance from the crowdfunded data. In that case, even if the developers raise the range to 20 ly, it'd still be a year.
So yeah, with distance limits like these, explorers won't really have much of a role to play in colonization, as practically all of the work had been done already. So yeah, this will be about logistics and trade. Although there would still be one task for explorers: to find some scenic surface sites to place ground bases at. Time will tell if there's going to be a demand for that though, especially if the first base will have to be an orbital station / habitat.