Does anybody has a thesis on why smart contract wallet like Argent hasn’t taken off?

If account abstraction is the barrier (dApps previously need a lot of work to integrate with these wallet), then zkSync/Starknet’s default account abstraction might be the inflection point.

I believe it's because there are not enough users on L2s yet where even without AA gas is cheap enough to make it work. 

I agree that it feels like we are coming on an inflection point. SCWs seem like the best solution for accessible self-custody.