I don’t see solid state replacing hard drives any time soon. I do see flash drives replacing floppy and CD type drives easily. The ideal setup, imo, would be a USB plug that accepts micro SD cards.
You mean like this? (don't know how long that link will work.)
That is the thing I'm going to try to Legoify. (look ma! I made a new word!)
They're already being offered in some laptop lines. Faster overall, and use less power than HDD. The only drawbacks at this point in time are cost and capacity, but that is also changing fast.
The mechanical disks' days are numbered.