When phones shipped with 8 or 16 GB, one could see the use for a microSD card slot. However, now phones have 128 or 256 GB of very fast and encrypted storage, the need is less obvious.
The clamouring for SD card slots in phones is beginning to look like mere dogma. I may be wrong, and if so I'd like to hear a reasoned argument in favour of them.
(The only vaguely sensible use case is for for prerecorded media (I wouldn't trust an SD card to maintain write data rates for all video types) but how many movies do you want to take to the Gobi desert - or anywhere else with no data wireless data access? SD cards *can* be encrypted, but then you can't swap it into a camera or music player. Personal and professional documents on an unencrypted card are a no no. )