I’m using Phoenix lately for the same reason, I think It's more aligned with how bitcoin will be used in the future. (Or how should be used in the future) 

But I don’t see the point of forcing RBF who will benefit ? 

Muun wallet simply needs to wait for a confirmation where applicable. Phoenix wallet does that and works fine; I personally recommend it over Muun.

As for other 0 conf services... Like what? There used to be a lot more. But they were getting attacked and gave up. Eg I haven't found an ATM that accepted zero conf for literally years. Nor have I found any in-person exchange services that accepted zeroconf without full AML/KYC.

Many years ago I did have some ATM operators complain to me that they'd lost a lot of money with zero conf though...

petertodd

In resume, Muun wallet and other 0-conf services will die with the next update.

bitcoin

Bitcoin Core 24.0 Will Enable Full-RBF — The End Of Unconfirmed Transactions?

iguano

In resume, Muun wallet and other 0-conf services will die with the next update. 