There’s also https://github.com/revoltchat which is very discord-like but still lacks some vital features that are currently in development like screensharing (if I am not misremembering)

I tend towards: No. I can’t know for sure, but given how pdfs are structured this sounds very difficult.

A workaround might be to automatically place white boxes over those, but you can probably still select the text underneath afterwards.

Good point! Trilium has been handed over to TriliumNext so it is linked in the repository directly and soon will be replaced by TriliumNext (afaik).

Thanks for sharing! Haven’t had the time to give it a listen yet, but will check it out soon.