I had a ASRock b350 and missed the train to upgrade to a 5800x because of the BIOs. If I had a slightly different MoBo I could have upgraded.
Looking for a AM5 board now and putting in a 7600 for now. But looking to see if I can get 8800x3d or hopefully the 9800x3d in 2026.
Policy from the CPU maker and willingness to cooporate by the Mobo manufacturer.
In this case, there was also a technical limitation in the form of BIOS ROM chips that were too small to hold a BIOS that supports newer CPUs.