AMD wont compete with Nvidias high-end 5000 blackwell series

Not with RDNA4, but that does not meant they won’t compete with 5000 series at all, RDNA5 high end is apparently coming out 2025.

We have gotten the first “changes” in Linux drivers for RDNA4

and not be silly expensive

Sure, but if the demand exceeds the capacity AMD can get from TSMC, moving Zen 5c chiplet production to Samsung would make sense