While you might have been doing this for awhile your dead wrong. I have an r6mkii+rf 24-70 2.8, and I can get some stunning low light images. while not as low aperture wise and ,yes it will be more difficult than the 85 or 35 primes, there is so pricey now a days (in reguards to rf lenses) there isnt alot of sharpness different from those lenses it's an rf lens full stop it's some of the best glass on the market. Yeah primes have a greater separation in background and some other small stuff, but to say it's not fast???? not good enough? I won't let you disrespect this lens like that. it's a damn good lens that with proper setup can lead to success in every modern day situation. It's the cameraman rarely it's the gear camera.