There’s one other limit which is you can’t go supersonic.
Also, before you reach supersonic, you get into the "transonic" flight regime where things get markedly WORSE from a performance/fuel consumption standpoint because the compression of the air as you near the sound barrier becomes just one big source of turbulence around the entire aircraft, not only sapping efficiency but making it dangerous to fly as it can mess with your flight controls.
This persists until you punch through that wall and go full supersonic.
So if you can't go supersonic? Don't even bother going much faster than "normal" for a jet.
Convair tried it in the 60's when they rolled out their model 880 and 990 jets that were faster than a 707 or DC-8, and specifically built for that transonic part of the graph, but , turned out that beating your competitors to the gate by 30 minutes wasn't worth the fuel bills (and higher ticket prices) of flying in that "almost supersonic" envelope. They were not good selling aircraft and were quickly discontinued.
According to the Cyclofags, all of these will be significantly reduced by banning cars and embracing cycling and public transport everywhere.
And, I suppose once you get to be 80 and have worn-out knees, and a bad heart, and no stamina anymore, and can't really ride a bike, through no fault of your own, THEN what?
Just die right?
Those who can't bike won't eat, right?
I mean, when these pro-bike people get to be 60, 70 , 80, they'll SURELY line up for MAID with a smile, right? What's good for the oldsters today is good for them in 50 years, right? RIGHT?!
It would be hilarious if there was an alternate team the other players could play as "big oil".
I'm thinking we'd have to create a
Magic: The Gathering style game for them, where black mana and "evil" spells are the domain of those with oil wells for land, creatures like "Monster F-350" 4/6 with trample, all kids on the board get -1/-3 and instants/interrupts like "drive over protestors" "murder inventor of reliable fusion power"