I think I may have recovered from the #RustWeek trip.
No, didn't catch any viruses or anything, it's just that I'm not a people person, and there were a lot of people there.
I'm also someone who likes being at other places, but hates traveling, and RustWeek was the furthest I ever travelled since ~1995 when I visited the UK (London & Cambridge). And I traveled alone this time.
Being physically not in a great shape also took its toll.
So, lots of things conspired to make it very exhausting. Was worth it, though, might do it again, probably not in 2027, but the break between my conference-goings will not be as long as last time (~a decade), and RustWeek will be a top contender for conferences to attend.