I’ve set up a notes.thelinell.com subdomain that uses Obsidian Publish. It’s a pretty neat and very easy way for me to continue sharing some of my notes online while still sticking to the general idea of “it’s just a bunch of Markdown files.”
It isn’t free, even “just S3” free, but I’m okay with the price tag for now given how easy it makes things combined with the positive impact of actually supporting a tool that I use. So far the experience has been absolutely 10/10 and, until further notice, I can’t recommend it enough.