"If you own a salvaged Tesla, you can’t get a single part (not even a screw or a little plastic bolt cover), you can’t use the supercharger".
With ebay and other on-line tools there is a thriving 'Junkyard' scene for Teslas... parts are available and relatively cheap. Maintenance levels are lower (no ICE/transmission) and most parts have German equivalents. Yes, there are 'makers', 'hackers', and backyard mechanics... some of them are dangerous (crazy car mods). Biggest concerns are the cooling system for the batteries and the wiring harness since those are safety critical and unique to Tesla.
On the other hand we have have 60k deadly Takata airbags driving around on the road (post recall) and no-body (not NHTSA or the insurance companies) are trying to do something about it. Think about all of the bad fuel pumps and rotting hoses on old gas-powered cars...
https://www.washingtonpost.com/local/trafficandcommuting/why...?
https://jalopnik.com/thousands-of-you-are-still-riding-aroun...
A friend salvaged a 85 that had no structural damage, but was dimmed totaled by insurance. Tesla then revised the policy and now Tesla repairs more. I know a mechanics at Tesla, and his job is to repair Teslas. Tesla used to send him across the globe and shipped parts so he could repair the car on site. Now, Tesla expands its repair facilities, so no more travel for him.
https://motherboard.vice.com/en_us/article/pamkqn/watch-trac...
We should be pushing to have the warranties and the safety critical systems parts and repair information covered under the NHTSA safety certification rather than the EPA emissions certification, but that hasn't been necessary until very recently, and honestly, the majority of people willing to buy a Tesla aren't going to work on them, just like the majority of people buying a regular car aren't going to work on them, so it hasn't been a real issue yet. Personally, I wouldn't buy anything that I don't have a legally enforceable guarantee of aftermarket parts, manuals, etc. on because I don't trust any company to actually provide ongoing support, esp. in tech cough google chat services cough. Particularly given the dollar figures involved...
There are several Youtube users that have salvaged a water-damaged Tesla by using the battery, engine and electronics from a crash-damaged Tesla using nothing but backyard engineering. Tesla doesn’t supply parts so they have to grab everything from donor vehicles.