Charge cycles are important but energy density is king at the moment. EVs need longer range. The 500km(300mi) of the larger models S, X and 3 and are the absolute minimum if you want the broader consumer market to consider EVs as viable alternative to combustion engine cars. It might be sufficient if the supercharger network is expanded.

But most EVs currently on the market have half that range. It's simply never going to be something people are willing to buy as a primary car (and most second cars are old primary cars that the family demotes to second car).

As for charge cycles, you could swap the batteries once in a while like you swap tires, if they are cheap enough.