Even if they have the chops they still have a long way to go, based on what I see online about them.

I've used AWS quite a bit, and they have amazing breadth and depth. After a few minutes of research for Alibaba Cloud, they seem to have the breadth but I'm not entirely convinced about their depth. The documentation is quite clear but quite narrow (they only seem to have a Python SDK?) and there doesn't seem to be much buzz online for their platform, though (i.e. blog posts about them, forum comments; most of the Google results for searches about them return only alibabacloud.com pages).

In any case, more competition is better, so they're definitely worth keeping an eye on.