I have noticed most elevators in minecraft do not work anymore, especially piston ones. This concept that I will be working on to improve is super compact and is super cheap to make. Currently it only can lift you 5 blocks, but the concept of it can be improved.

Concept:

One normal piston pushes up a sticky piston, and then the sticky piston lifts up the normal piston. This is why I am code naming this the "Caterpillarvator." :P

*If you are good with redstone and you want to do something with it you may, but please give me credit and diamond this submission.*