Typst is way simpler to learn, especially if you’re used to markdown. You can first approach it as a markup language like markdown, but with some scripting.

Package management in LaTeX is infuriatingly bad, you can’t even specify the version you want to use.

Some journals and conferences are starting to accept Typst.

Personally, the huge difference with LaTeX is that if I want to do something slightly complex that is not covered by a third-party plugin, I’m not afraid to get my hands dirty and script it myself, whereas in LaTeX, I dread writing macros that do more than being notations/shorthands.

It’s not the same use case. Asciidoc is closer to markdown/org/reST, i.e., simple markup languages, whereas Typst also emphasizes on presentation (layouting, element positioning, creation of complex figures, etc.). You can reproduce features from Asciidoc in Typst using scripting.

As for editors, aside from the official webapp, and the community LSP (tinymist), there aren’t that many available.