You’re doing a good job in my opinion. I also try to reply to people. Because having a discussion was the reason why I posted in the first place. But I think it’s not necessary to reply to everyone. I just upvote comments that I don’t have a meaningful reply to, and that way people can see that I (or someone) appreciated them typing it out. I think that’s enough. And I don’t judge an OP by replying specifically to me. I just look if they at least added one or two comments to their discussion themselves. And if there’s votes to some of the comments. If that’s the case I think everything is fine.

(Though, I at least demand one vote for my comment if I give a correct answer or give a lengthy reply. Sadly that doesn’t always happen.)