Q:  2.5.20  2:22 pm   So what if I have to play piano at a setting and there's only an acoustic piano and I need to play in the key of Eb? What do I do then? So I think I might have to learn every key.
A: yes. if you plan to be good with acoustic pianos, then you'll definitely want to be good in all keys. the good news is, it will be very enriching for your life to be comfortable in all keys. it will stir things up in just the right way. provide some variety to the physical shapes you are working with. so you will feel those benefits in addition to the practical benefits