I like this.
Zapping as a silent acknowledgement/ appreciation without feeling force to reply filler text for the sake of replying

I zap to acknowledge that a stacker has read and commented but not all comments need a reply. A zap is a proxy for thanks in my opinion. 

grayruby

Zapping all comments is something I absolutely agree with. I've zapped all the comments I've replied to, but not all those posted. I should adopt your practice. In my opinion it is fair to zap all comments and reply to as many as possible.

Taft

Should I reply or not to every comment on my posts?

I don't reply to every comment on my posts but I zap them all (even if it is just 10 sats) and reply to most of them. Unless they are clearly a bot or excessively stupid. 