As I recall that (which I could not find again) there were some facilities that were not included in Fusion, although I am not aware of any big issues of features between Alibre and Solidworks. I had thought someone had mentioned a few differences in actual available tools between Fusion and Alibre, etc.
Presumably that is the "price" of using a free product. All the other CAD programs are, and it is indeed a non-starter to have cloud storage. One would assume that the standard commercial version of Fusion would HAVE TO be local storage. But, not having used it, and not wanting to use it, I cannot give a list of things it is missing but Alibre has. I am pretty certain that Fusion does not have all the capabilities that Alibre has, but on the other hand it apparently has some that Alibre does NOT have. Fusion is the competitor most often mentioned, apparently it has tons of users, which is no surprise since it is free for the casual user. I have no complete answer when someone asks "Why should I pay for outlandish maintenance costs when Fusion is FREE?". The main problem I find is with free CAD. But it has tons of add-ons, and is a very workable CAD system. I also find that it has at least as many quirks and odd failures as Alibre. I have used it and it is a good package, although one I do not like as well as Alibre on a usability basis. I understand when someone prefers Solidworks. I'd surely like to be able to rebut those who say "Cad system X has tons more features", or, more commonly, "Free CAD does just as much or more". Is there an actual comparison of CAD system capabilities and features anywhere?
This is something that probably needs to be dealt with on a marketing basis, because frankly the free CAD is probably a major competitor as well as the obvious ones.