I also was under the impression all trams were back.
While to some it might seem a smaller thing to be upset about, to many others it is not. It was said before, but after you walk miles in the park, having to walk another few miles to your car can be torture, especially if you have small children, putting a major damper on the end of what might have otherwise been a pretty magical day. For those who rent wheelchairs or scooters, not all have/use handicap placards. Under normal circumstances in day-to-day life, how much walking does one person typically do? Gonna go out on a limb and say FAR less than they do in a "low walking" day in one of the parks. If you have hip/knee/foot/endurance/whatever issues, it might not be necessary to have mobility assistance on a daily basis, but a visit to WDW might be impossible to experience, much less enjoy, without that help.
While this may a cost-saving measure, it is a very poor decision from a customer service standpoint and I hope it is something that is asked about in the guest satisfaction surveys. That said, WDW isn't really knows for their gold standard customer service and eye to exceeding guest expectations anymore, so I suppose I shouldn't be at all surprised by the situation.
The more TWDC chips away at the "small things" that make a WDW vacation enjoyable, the fewer people will return. Beyond that, fewer people will talk about what a great trip they had and how they can't wait to return. That "free marketing" they've enjoyed for decades will dry up and have an effect on attendance eventually. It may take a while, but I think there will come a point where the bean counters will look up from their cost saving calculations and wonder why the parks aren't filling up like they used to. By that time, it may be too late to right the ship quickly and could take years to bring people back they way they are flocking to the parks today.