505
When your vehicle outlives its cloud: What happens next?
(arstechnica.com)
This is a most excellent place for technology news and articles.
Enforcing 20 years of support would be difficult since they'd presumably be going bankrupt/closing anyway so they don't really have anything to lose.
Bond.
Big automotive conglomerates won't go bankrupt.
If they do, your tax money will bail them out.