I don’t know about stopping it if someone is sufficiently determined to get in, but if it’s a repeated problem, I suppose that you could put something that looks interesting to steal in the car with an AirTag-type tracking device or similar hidden in it and then provide the police with the thief’s track if they bite.
Putting visible cameras all over might deter some people.
I’d guess that parking in a garage would help, but you say elsewhere that that wasn’t an option here.
https://www.roadtovr.com/steam-frame-ram-shortage-release-date-price/
I’d actually rather see them just push the date back by, say, 1-3 years and then bump up the specs on it and launch in a more favorable price environment.
Once they start shipping, as with consoles, they’re kinda tied to the current generation of hardware for some years as developers target that hardware.