Same goes for Dropbox - you can already build such a system yourself quite trivially by getting an FTP account, mounting it locally with curlftpfs, and then using SVN or CSV on the mounted filesystem.
I understand your jest, but you can really vibecode your own Dropbox in this day and age.
I'm pretty confident that Grok CLI 4.6 could one shot this.
Yet most don’t. Because they don’t wanna spend time on it and they want a tested and proven software. Heck why even use Mac/linux/windows when you can just vibecode your own OS.