I've been running a tech blog for 5+ years now and it has thousands of comments.
I happen to be using Disqus (not proudly, it is what it is), and I've only ever had to moderate a few comments. Disqus does a pretty good job at stopping blatant spam. Sometimes you get those people who reply with "Nice article, have you checked out example.com?" where it's clear they are just trying to drop a link to their service. But these rarely happen.
I like comments because it creates a sense of community, and sometimes with tech articles things get outdated so it's nice to wake up to see a comment saying something has changed. It's a good reminder to go in there and update your content.
I remember one of my Docker posts having something like 500 comments over the years (around setting up WSL 1 and Docker). The overall strategy worked and most comments were "Thanks, worked perfectly!" but there was a decent chunk of folks asking for tech support because it didn't work for them. Those were really beneficial to me because it helped discover some edge cases, some of which I reported back to Docker directly.
I'm a firm believer that if you're going to put stuff out there it's your responsibility to own it from beginning to end. That means writing it, making sure it's accurate, keeping it up to date, answering questions and everything in between.
