Giving example of Amazon: their vendor lock-in does not allow to reuse most of AWS code and requires companies to take a "happily-everafter" marriage with their

Giving example of Amazon: their vendor lock-in does not allow to reuse most of AWS code and requires companies to take a "happily-everafter" marriage with their tech, that's why clients, when trying to disable vendor lock-in, spend a lot of money to create facades that would allow to use different cloud providers, but usually they fail (anecdotal evidence only)