Yep, it's weird on my side, either I get like 50 or more comments on my posts or I get none :D
I try to reply to all of them but sometimes it's not humanely possible. That being said, imagine back at the ATH I was getting around 300 comments on some of my posts :O
Still, I tried to reply to all of them but I ended up having to set myself to a limit otherwise i would spend a couple of hours a day just replying to comments.
I understand that with loads of comments you're more selective to who you reply.
But I think especially right now, when there are already less comments on posts, replying (to keep commenters motivated) is almost crucial. Also because the upvotes on comments are worth less (which btw could also be a reason for this less commenting).
P.s. I guess by now it'll be clear that my words are by no means a complaint, but more constructive criticism.