The question comes as I start editing the Configuration.h for an updated Marlin and see it defaults to 250000 now. I've been using 115200 up to now and never felt a problem with that. Or is it I just didn't notice the symptoms?
A higher speed at some point brings a higher risk of communication noise, in theory. I could simply test it but thought there should exist some knowledge about this already. A quick search didn't show me evidence, though.
Does it make any practical difference?