I think that the microSD reader could be upgraded in two aspects:
- somehow smoothen the sharp edges of the input slit, as it tends to catch on the sdcard (upper/lower lip of the slit, as well as the left/right ends of the slit) and kind of scratch it (and nowadays microSD cards can be expensive little things, with 128GB or more)
- use a spring mechanism to help push out the microSD when we are done, as it is often difficult to grasp especially when finger nails are short. Moreover such spring mechanism could allow the microSD to seat even deeper in the reader and stick out less, thus improving the portability of the laptop with the card in.
Also, if this kind of upgrade happens, I wish that it stays a microSD reader, so as to not have to deal all the time with a SD->microSD adapter.
(IMHO the use case of full-size SD cards is slowly disappearing.)