Most people use custodians, and will continue to use custodians because it’s much easier.
If self-custody Lightning somehow becomes as easy as a custodian, there isn’t enough L1 bytes to onboard the world.
Discussion
> If self-custody Lightning somehow becomes as easy
#Phoenix makes it very easy.
It's more likely that lightning wallets will be managing the liquidity through LSPs but the service will still remain self-custodial.