If you're worried what a car is gonna be worth in 20 years, you're in the wrong hobby. Until we know what the production numbers will be at the end of the run and what happens in 15-20 years with availability of gas, will dictate demand. If gas prices continues to rise, demand for gas guzzling gas powered cars will drop.
You cant compare these to V2 Wagons, less than 2000 wagons were made in the 4 year run of it and less than 360iirc were manuals. They already made ~1640 5BW for MY22. Production should go till MY2025 at least, I'd imagine we'd at least hit 5K produced in the 4 year run.