I'm sure you know about pandoc for translating markdown into html (and all it's other tricks).
Pure HTML generated from a text file just works and probably will forever.
I mean it’s just my personal website which is mostly just for me to look up things quickly / personal wiki
I also never said that tools like pandoc are obsolete now. Just in my case they are already overpowered and I might migrate to something simpler soon. Otoh i might just run the current version of 11ty indefinitely and never upgrade.