Warzone 2100 (you can download for free as it is an old PC game that went GPL)

gets more on the nose by the day

Efficient is sexy

Well the minimal bars for electronics is:

0 - The repair manual exists and is readily available with full schematics of the item in question.

1 - Replacement parts are available for purchase.

2 - Compatible replacement parts are made by 2 or more 3rd party companies

3 - Designs for replacement parts are available

4 - Local maker space is able to make the needed replacement parts.

If you can’t get level 0, you probably shouldn’t buy it if you expect to keep it working for life.