Yes, MI2XX have been around for a while now. We were originally going to deploy those, and we still might if there is customer demand. However, after the release of MI300x and the increase in power it has, we are now focused entirely on that model for the business launch.
I agree with you, the developer flywheel is missing today. Part of Hot Aisle's mission will be to work on this over time. From what I've seen, Lamini believes in this aspect as well, as they are more focused on the software side of things. We are initially focused more on being the capex/opex deployment, as these chassis are very expensive and a bit challenging to deploy.
I've used AAC before. It is something that AMD aquihired off another company that developed it. It is pretty snazzy, it easily lets you run a container on their hardware. I doubt it will ever be commercialized by them though. It also has very limited hardware resources as it is always being used. When I used it, the best I could get at the time was MI210's.
Once I get the hardware, I'm expecting to do a bunch of initial benchmarking in order to drum up interest in these cards. If you want to ping me privately, I'll keep you in mind for access. The more software that runs on them, the better.