If you want to see some criticism of svelte, one of the core maintainers recently asked about some things that could be improved about svelte in the next major version: https://twitter.com/trueadm/status/1676694161188159490
That should give you some rough ideas about the things that the community itself thinks need improvements.
I have no expectations, but I thought I might as well ask: do you know if there are any apps that will unroll a Twitter thread given a link like the one in your comment? The web version of Twitter no longer shows threads, and I've spent enough time scrolling through the shitty Twitter user page UI looking for old tweets that I'd really prefer an alternative if there is one.
That should give you some rough ideas about the things that the community itself thinks need improvements.