>Stuff like this should not be legal.

Alternatively, if users want legally binding contracts they should not treat promises as such.

Statements a manufacturer makes about their device before purchase are usually treated as legally binding. Saying you provide 10 years of updates is just like saying your charger delivers 60W.

You don't need a contract for that, if the statement is untrue the product is now defective. And if done on purpose this is usually considered fraud