I don't really have what you'd call a personal website. I have a flat, emptyish homepage and a bunch of differently-constructed sub-pages which aren't linked anywhere, rather I give the URL out to people as appropriate (like my CV or a demo app for example) and don't worry about being listed in search engines.
As such, I use whatever code I feel like for each thing. Mostly it's plain HTML/JS but there's a little PHP and Perl thrown in from time to time. I have tried using things like Grav and Netlify-CMS but in the end I just don't have the need for such things beyond the fun of experimentation.
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