This idea isn't new. Companies in the B2B and industrial space typically contract out to other companies like what you describe to provide 10+ year support plan

This idea isn't new. Companies in the B2B and industrial space typically contract out to other companies like what you describe to provide 10+ year support plans for products. The trick is that for a consumer market, the margins are typically much harder to work with -- especially with startups. In fact, there's a zombieco that took over running Vector's upstream servers when Anki died, so definitely not new.