Author here. Thanks for asking. One key objective is not to be yet another linksite, but add utility by providing direct shortcuts to code, docs, api references etc. next to the main link.
Is this a need people have? I would use letsbuild.ai to discover projects and check their homepage/documentation, but once I know a given project I know where to find its docs (or search for "<project> docs" on Google).
Which UX improvements are you thinking of exactly? This is a website I would personally not use because all I see is a list of links without context nor explanation about which tool is better than another for which task.