I like autosaves as well, but as a "I didn't save manually but there is always an autosave"-option. Saving is also a file managment choice.
However, Cmd-S is so engrained into the muscle memory, that it's almost instinctual to hit it after every press of a semi-colon.
For certain programs this would be overkill of course, but for others it would be quite cool.
VSCode has an autosave that's triggered when you change a file.
> Too bad they can't steal more sane ideas from JetBrains' IDEs, I might actually consider switching ;)
Not being an IDE is what I like about it, my experiences with JetBrain's IDEs weren't good.