I’d love to get an e-bike, but I have no indoor garage to keep it in, and they get stolen at a fast clip in my area (Ballard in Seattle). If the police were more aggressive (or even just nit apathetic) to bike thefts, I would totally consider it.
GPS isn't itself useful. That lets the bike know where it is, which is meaningless without the ability to communicate that to the outside world. That requires a cell connection and active subscription, which costs money. Most bikes do not have this ability.
Also, trying to re-get your bike from an encampment after you tracked it down is dangerous, and the police might not have time to help you get your property back (although I’ve heard a success story here as well).