A LOT more could be done IMO. The trouble is that most electric wheelchairs are designed by people who put profit first and they have no idea about the users' needs.

I could write a book about the improvements that could be made on my wheelchair alone (I'm on my third Puma 40). Let me loose with a good engineer and give me the budget to do so, I KNOW I could build a better wheelchair. There will be a little less profit for the manufacturers, but the amount made on them by dealers is staggering - they should be available without these middle men trebling or quadrupling the price.