I challenge you to try to get it working and train a basic LLM yourself on multiple AMD gpus. It is far worse than the situation with Nvidia GPUs/Drivers and Linux circa the mid 2010s. Which is saying a lot...
But don't take my word for it. Geohot, maybe one of the best hackers of our generation can't even it working: https://wccftech.com/tinycorp-ditches-amd-tinybox-ai-package...
It IS trash and it's clearly NOT mature. These are not mutually exclusive. There have been attempts to get AMD to open source their firmware to let people work on it since they themselves seem disinterested in doing so. Until then AMD is not a real choice for serious ML work.