Fair enough, it's a hard problem to work on indeed. But I would ask, why not raise investment then? Why is the solution a ban, when we have working prototypes that get better every month and that have done maiden voyages? The solution is larger investments and partnerships into more R&D on these crafts, not to shutter the prospect entirely...
My point is precisely that: those investments are happening, that R&D is happening, and electric planes will happen, and they will reach commercial scale at some point.
And when then do (I would probably bet "in 10 to 15 years", and I would absolutely bet "later than you're optimisticly hoping", because that's what the people making the planes are saying [1] [2]), then the bans won't make sense, sure. At some point.
But the emphasis is _AT SOME POINT_, where the commercial fossil fuel propelled planes are travelling and emitting _RIGHT NOW_. The best time to reduce the number of flights was 20 years ago, the second best time is now.
