Earlier quoted context omitted.
Are there downsides to OneDrive? I can see being resistant to change, haven't had issues with it (and have benefitted from the auto save quite a lot).
It's not at all about being "resistant to change". OneDrive has been around long enough that it doesn't really count as "change" anymore. There are downsides to OneDrive. Topping the list is the risk of data loss. Every dev here has at least one story of OneDrive getting confused in a way that led to data loss (that's usually what got them to start avoiding using it). It can also be inconvenient and get in the way in…
I've had some irritations with it, but overall having versioning has been a much bigger benefit than the hassle.