It's also worth noting that it seems infrequent for companies to move mature products to a different cloud. My preference is for agnostic tech, but there's a f

It's also worth noting that it seems infrequent for companies to move mature products to a different cloud. My preference is for agnostic tech, but there's a fair chance of YAGNI for the flexibility. If some proprietary tech simplifies your operations, consider whether you'll actually get hurt investing in it.