It'd be so easy to do a version of the "infamous Dropbox comment" on this ("you can already build such a system yourself quite trivially by getting a MIDI cable, an audio interface, and a raspberry PI...") but of course what you have is exactly a sort of Dropbox Of MIDI here where it Just Works™ and backs up all your music automatically with no hassle.
It'd be so easy to do a version of the "infamous Dropbox comment" on this ("you can already build such a system yourself quite trivially by getting a MIDI cable, an audio interface, and a raspberry PI...") but of course what you have is exactly a sort of Dropbox Of MIDI here where it Just Works™ and backs up all your music automatically with no hassle.