I use NextCloud for informal shares as its GUI is very similar Microsoft or Google's -Drive and is easily adoptable. I also host a private pastebin instance for code or guides I think may be helpful, and Matrix for personal stuff. But I do like how Bitwarden/Vaultwarden's share works -- it feels more secure, like WeTransfer. It still has its applications. And Vaultwarden file share is free, size limit is adjustable in server config, and is not limited to what the Bitwarden clients say!