I've never heard of AWS suing someone to keep using their services. I wouldn't be surprised if Oracle or any outsourcer did that...but that implies a breach of

I've never heard of AWS suing someone to keep using their services. I wouldn't be surprised if Oracle or any outsourcer did that...but that implies a breach of contract, not a transition after a contract is done. IBM sells mainframes because they're impossible to replace due to the way they're used. Those big printers that print financials statements apparently don't talk to anything else (funny, I was just talking about those the other day). It's about I/O and throughput with those things. You'd think someone would have come up with a replacement, but presumably the market is so small that nobody cares.