Some successes today:

I like vuejs, but recently they messed their buildsystem (trying to abstract it --- but the abstraction is so leaky, that I just wern't able to modify it). So I rewrote two components to Svelte, and gosh, this stuff is super-simple.

Keep in mind that vuejs is much simpler than angular or react (and svelte is simpler than that).

Also svelte is the only part of the project that works.