I daily drove a lightweight aluminum flywheel car for 30k miles from 2008 to 2010 -- commuting and city driving through the hilly streets of San Francisco.
It's all about your personal tolerance and "foot/calf coordination."
The Camaro I have now came with an aluminum flywheel but the gears are mismatched for now so I can't really enjoy it or utilize it. I will be remedying that though.