I've upgraded from the Note 10 Plus 5G 256gb with 128gb memory card to S21 Ultra 512gb 16gb ram.
I always found using memory cards slowed the devices down and is one main reason other companies done away with external storage ages ago. I've used many different devices and different memory cards but is the reason apps cannot run from memory cards very well because they are too slow compared to Internal high speed storage.
You can still connect USB drives using a USB adapter but not buying a device just because its got rid of a really old slow feature is silly as pretty much all devices are the same because if the low memory speeds.
Fisky