It is now 2025, Unless it is an extremely popular site where every blog post has hundreds of comments. For most blogs hosting your own comment section shouldn't even be a rounding error or expensive. Why do we still have to put up with Disqus?
Blog like Michael Tsai [1] do it just fine. You submit a comment it render the page on server.
[1]https://mjtsai.com/blog/2025/09/29/ios-26-0-1-and-ipados-26-...