> The other day I searched for an hour and couldn't find even one. They used to be endless.

Oh there are still endless blogs. There are definitely a lot of defunct ones - but many have become active again recently. I review the unknown ones I come across here: https://www.kickscondor.com/hrefhunt/ (I skip software and startup blogs, because they are so numerous.)

You just can’t use the old avenues (Google searches, casual social media mentions) to find them. HN is a good source, Indieweb circles are good, and Pinboard and Are.na are other good catalogs. Once you find a few blogs you like, you’ll find your way to many more.