One of the 2 best features that keeps me sing my old 645M more than my 245M is automatic lactate threshold, which could be ported to the 245M. I was taugh5 that lactate threshold is a real measure of fitness. And Running Power. I know a barometer is needed for real-time and it probably won’t happen, but add it to the 255M when it comes out. I use real-time power when I run, and I like it better than time or pace, it corrects for incline, height, weight, etc.
just a request.