My sense is that they're somewhat better than, say, AMD at keeping development work in the open instead of just throwing code over the wall. Hence the choice of

My sense is that they're somewhat better than, say, AMD at keeping development work in the open instead of just throwing code over the wall. Hence the choice of "development model" instead of just "FOSS". It's a low bar though, IIRC a lot of ROCm is just periodic code dumps with no visible PR strategy.