It basically costs nothing to pre-render a static site, which then serves several orders of magnitude faster. I'm confused why anyone would do it this way in this day and age.
I considered monitoring popular posts and prerendering those. Feels like code bloat for something that might not happen.
Don't get me wrong, this blog used to prerender everything. It kinda sucked to compute which pages were affected by a change in any given page as it might need to patch indexes, cross linked references, and so on. It can be done of course, or you can simply re-render everything anyway. The added friction for development and maintenance was not worth it for me.
It is my personal blog, it is not a personal branding site to show people my cool web skills or anything. If it goes down, let it go down.
I know some will go 'oh well I want a web interface to create or edit posts in', nothing says you cant just implement that part dynamic and have it update static components on modification of posts.