People sometimes have nonstandard needs, or get sick, or need to deal with another passenger's overly aggressive behavior. It's more about how the flight attendants react to those situations than to standard service.
I've started using a wheelchair recently so that's fresh on my mind. I haven't flown with it yet, but I'm nervous at the prospect of my delicate $10K power chair being smashed to bits in the cargo hold, or lost, or the flight attendants losing patience with me getting to my seat.
Are you not able to use it on the plane itself? It's been a long time since I've flown anywhere, but I seem to recall there being quite good accommodations for such things.
sadly no. ostensibly for safety reasons actually, I think, but likely more because airlines would have to sacrifice seats for wheelchair space. instead, you either have to limp (if you're able) or transfer to a transport chair so they can wheel you to your seat. it's a hassle.
it'd be a tight squeeze through the aisle if it were possible, but I could make it work in my chair.