Of note is that the Trezor Safe 5 still has the card slot to use SD Protect even though it contains a SE. Wouldn't hurt to continue using SD Protect along with the SE, but maybe that is overkill. We all have to decide for ourselves.
I am not saying this is bad thing to have Micro SD card slow, but I don't like Trezor Safe 5 because it's to expensive compared to Trezor Safe 3 and it's not offering anything special.
Micro SD would work much better with Airgapped wallet if full functionality was enabled, maybe this could happen in some upcoming devices coming from Trezor, Safe 7 or something similar.