For a while, everybody was shipping Altium libraries. This was really good because, as we well know, engineers are lazy. Thus, somebody would simply pack up their internal libraries and ship them. This meant that every symbol had been shipped and tested in a real product. Consequently, the libraries generally didn't have any fatal faults. And you could extract the symbols and make whatever edit you needed to fit into your own library management stuff.

And then Altium decided to enshittify things in order to extract rent from library management. Now, you couldn't extract symbols or footprints from a library, or you had to register with their cloud garbage.

And then SnapEDA and its ilk came along to "fix" this problem that Altium just caused. Except that engineers are lazy. Nobody uses SnapEDA for actual internal libraries for production boards inside the semiconductor companies. Consequently, the libraries have minimal feedback and you have to beg people to send you fixes. Which, of course, they don't do because engineers are lazy.

And don't get me started about the "licensing terms" behind using SnapEDA symbols.