Interesting, but doubt I'll use it as there aren't any filters for open source/ self hostable so most of it isn't relevant to me.
Likely stick to looking at things like
https://selfhosted.libhunt.com/ and
https://alternativeto.net/
https://www.reddit.com/r/selfhosted/ pretty useful too but I mostly forget about that one.
Saying that, I do also sometimes look at stuff like:
https://stackshare.io/collaboration
https://stackshare.io/business_tools
Just to see which tools are popular (and then look on the other sites to find open source and self hostable alternatives for them)