I started from the assumption that it would work, but then I see a pattern of modbot messages and failed medium edits, so of course I get gun shy about medium edits. I also trust the developers to call attention to potential pitfalls.
I don't have an encyclopedic memory of my edits, nor do I have any reasonable way to analyze the edit history to see "oh, this medium edit went through after another one, but this one didn't." You're asking someone to notice that some medium edits fail and others don't (I did), that the edits that fail are conflicts with other medium edits (I did), that some medium edits which might be conflicts don't fail - which requires remembering two separate edits and unlike the first two doesn't call attention to itself (I didn't), and then to observe that the difference between the failed edits and the not failed edits is the space between the tracks.
Maybe someone would get lucky and catch all that on their own, but I think it's unrealistic to expect that many or most would. I put that kind of detailed analysis into making good edits, not tracking my edit history.