I'm not sure why you're being downvoted for a legitimate concern. But, to answer your question, AWS does constitute lock-in and migrating away from AWS is a ma

I'm not sure why you're being downvoted for a legitimate concern. But, to answer your question, AWS does constitute lock-in and migrating away from AWS is a major pain. However, companies from big to small see this as a price worth paying for the flexibility of AWS. That said, I don't think it's the only viable kid on the block any more. The competition, e.g. Google, is getting to the point where choosing AWS is no longer an automatic and should be weighed carefully. This is where the downside of lock-in starts to factor in.