The whole discussion of ..oh, no one needs 150Nm/1500w is disproven by the market. If only a small percentage of riders want/need that much power...why then are almost all manufacturers racing to add Avinox motors?
If there is no weight penalty for the extra power....why wouldn't you want it available ? The whole notion that having 1500 watts is some kind of tipping point that once breached will bring down the force of government upon the industry is rubbish. How can the government know that 1500w bikes are creating some unspecified problems? Is there some organised group of people complaining, or is this whole discussion preemptive?
If the silly speed limits remain, as if you can't be a menase to other trail users on ANY bike (with or without a motor), having 250-500-1500w makes no difference. Just because you can climb a hill 5 mph faster with more power doesn't make you a more irresponsible trail user.
I reject the idea that power/speed limits should be enacted to protect against the (supposed) abuses of the least skilled & least responsible riders forcing the rest of us to suffer because of their behavior.