Everytime I'm tempted to think software is easy compared to hardware, I just remember that AMD is leaving about a trillion dollars worth of market cap on the table, because they haven't figured out a good alternative to CUDA.
ROCm 6 was out Dec 16 (2023), 5.5 was May (2023). 5 was Feb 10 (2022). 4 was Dec 19 (2020)