I’ve had bikes with carbs and with EFI.
The warm-up is a non-issue for me as I would simply start the bike with choke full-out, immediately push it about half-way in (until revs just start to drop a little), put my gloves on, check the lights and then take-off. A mile or so down the road (depending on outside temperature), I’d push the choke all the way in and be done with it. Not a problem.
A drawback with EFI though (which is apparently quite common) is that when “coasting” (in gear), they can have an on/off feeling from the throttle (a.k.a. surging). This is difficult to describe, but it can be uncomfortable and annoying. Bikes with carbs don’t have this surging.
EFI bikes are definitely more fuel efficient though and it’s only a matter of time before carbs are phased-out completely on motorcycles due to ever more stringent air quality laws which carbureter fuelled engines will be unable to meet. In fact on the pre-EFI (carburetted) Bonnevilles, Triumph had to graft on secondary air injection in order to meet pollution regulations.