Yep, post-covid it seems like airlines are favoring fewer flights that are more packed. I don't fly a lot (couple times a year), but when I do, it's very rare to see a flight that is not at least 95% full.
Yeah, for the routes I've flown over the last 5-10 years, significant numbers of empty seats are very much the exception rather than the rule, and it got worse post-covid.