For landscapes you usually use a small aperture so 1/500th of a second is not a problem unless you're trying to shoot 3200 film in sunny f/16 weather. My Mamiya RB67 only goes to 1/400th with its mechanical leaf shutters but for what I shoot with it, that's fine, 400 ISO film is 1/400th @f/16 in bright sun, go figure. If I need to shoot sports or birds in flight, running children I'll more commonly use my EOS 1N RS with up to 1/8000th electronic vertical shutter speed, 5-10 frames per second motor drive and servo autofocus available.
This morning however, a chance sighting of a Bald Eagle had me with a 300mm lens for my manual focus, manual exposure Canon FTbN (max shutter speed 1/1000) or 70mm on my autofocus auto-exposure EOS 650 so obviously I choose the FTbN. I only had 400 ISO film loaded so I shot at 1/500th, hopefully they turn out! Usually I have my EF 100-400mm zoom with me but my EF setup was just for a Christmas party where I don't usually need 400mm...