I removed all commenting options after about 8 years of blogging. The reason was spam, noise and little value add.
Around 2015 70% of comments coming in to my blog were from bots and another 10% from anonymous folks making irrelevant, and sometimes insulting comments which I all had to delete. About 20% of the comments were still valuable, but moderating felt like an additional stress, on top of writing.
After a few of my blog posts made it on to Hacker News, I noticed the discussions here are far more interesting and productive, surpassing the best comment threads on my blog over the 8 years while I still had comments open.
I removed all commenting and never looked back. When I write, I focus on writing. If anyone wants to, they can find my contact details to share insights about the post - and some people still do.
As someone writing a blog, I'm much better off with no comments open to the whole world. I suspect this is what most other people have also realized.