emanote VS mkdocs-material

Im personally using Emanote which does exactly what you describe. It supports LaTeX and lots of other features via Pandoc. Its also very nice to use in that it supports hot-reloading, instead of requiring manual refreshing. The only downside for some might be that its installed via the Nix ecosystem which is (great but) a bit of a rabbit hole you might not want to deal with, particularly depending on your level of technicality on the computer.

Have you considered neuron or it's successor emanote?

Emanote! Very lightweight. One of the things I can't stand about Notion is its speed.

Also, I'm willing to mentor anyone who is interested in improving Ema or Emanote.

Clarification: Emanote is a successor to Neuron, and written on top of Ema.

I use obsidian (previously just vim) and emanote (previously neuron) to compile some (but not all) of my notes to a static site.

I maintain an extended version of Emanote in Haskell (as an Ema app) that does custom stuff like visualize my hledger transactions, track time, generate invoice and provide custom views of my Markdown notebook, like a Twitter-like timeline generated from H2 headings (with date) from across notes.

Material Mk-Docs by Martin Donath works well if you prefer python.

https://squidfunk.github.io/mkdocs-material/

I'm an 'outsider', but from from the outside the Material For MkDocs Project looks like a very well managed open source project.

Martin Donath's project uses a 'sponsorware' release strategy to generate donations.

From my vantage point it seems to be working pretty well.

I just recently went through this decision process. My aim is to write code and math oriented posts so I need good support for nice syntax highlighting (at least colored) and mathjax (preferable) or katex. Substack is the most popular newsletter platform but fails at these two criteria. I love how math and syntax highlighting (plus numerous other features) work in MkDocs Material, which recently added a Blog plugin.

I wanted to combine the best of both: Substack as an amazing email social network, and MkDocs Material’s awesome look. So I’ve gone with using Substack as the core platform which I use to manage subscribers, and use it to post either math/code-free posts or a short teasers pointing to my main blog site on MkDocs Material when I need to show math/code

https://squidfunk.github.io/mkdocs-material/

I've been migrating content to MKDocs (Material) over the last few months, so feel fairly qualified on this subject. It's somewhat limited in terms of navigation, but can probably handle 400-500 pages; you can see how navigation works in the link. Otherwise, it can handle most, if not all, the tasks you've listed.