Wow. That's funny because that's the exact evolution that happened at my current company (GoDaddy points to AWS and AWS does the rest) and we're now a unicorn. Being a unicorn is not a reflection of engineering quality though. That said, the earlier engineers were pretty bad (So bad that someone at one point terminated every line in Python with a semicolon. Those engineers are nearly all gone now) and I like to think that the current groups are decent engineers. But I don't see us ever going back and transferring the domain somewhere else.