Forgot to mention #5, #6, #7, #8
#5 A removable battery like they did in old laptops. (New laptops have built in rechargeable batteries, but I loved the ability to swap a dead battery with a fresh 💯 % battery.)
#6 The removal battery with some new tech built into it. Like ports on the removable battery ie: type C input/output.
#7 Also, the ability to plug a charger in the handheld, remove the dead battery, and replace with the back up battery and then unplug it to continue the portable experience (*not near a socket? Use a portable charger to help swap the battery otg)
#8 port placements I have the LLG and if I want it docked in some way or fashion. The male end of the type c cords, if not set right can cause the port to become loose. (#6 maybe add these ports onto the rechargeable batteries as well)