Function over form, Phil?
Absolutely, on a bike. I mean leather is a silly choice lets face it, same as leather hand grips/covers or leather seats in a ski boat. Just when they invent something that's economical, looks good, is relatively easy to work, weather proof/water proof people seem to need to take a step into the twilight zone because it isn't "special" enough. I mean seriously, rubbing waterproofing junk on a seat periodically or carrying around a little "shower cap" to stretch over it when it looks like rain, good lord, madness.
Cars are different, although I don't think it's necessarily the best in a car either but at least it's not retrograde. BTW if my memory serves me right high end leather for car seats has a plastic coating anyway. I seem to recall the premium leather for BMW's etc is made here in Melbourne Australia or was. Someone can check that I'm sure. Both my cars came std with leather seats.
Ciao