I think the point is that a bunch of companies make or made good printers, and Prusa stands out because of their community.
Perhaps you could replace community with ecosystem in that sentence.
I stepped away from FDM printers and onto Formlabs' STL printers around when U2 ruled (not exactly a move to greener pastures, they're closed-source all the way), seems like a lot has changed since I left as no-one is even mentioning Ultimaker or Lulzbot. I'm just kinda disappointed and bummed to see Ender of Creality and other Chinese printers enjoying increasing prominence considering their flagrant and persistent GPL violations.