If the loaner program is going away without a replacement, I'm very concerned. It's bad enough to have to take the time out of my week to go there, drop off the car, get a loaner, then go back again the next day. It's a total of 4 hours. If they replace it with Lyft service both ways, that's OK. I just take the loaner home and back.
Tesla needs to distinguish the cheaper cars from the premium cars. One thing they could do is offer free loaners for life to premium car owners (Model S, X, and Roadster). That sort of thing is offered by some other premium car makers.
At the Portland service center when I have gotten Tesla loaners, they have always been lease returns or older cars traded in. One time I got a Model S 75D that had never been sold. A few times I've had rental cars. One time it was an awful Nissan that was one of the least comfortable cars I've ever driven.