This is possible but friction welding needs temperatures to reach above melting point for a little while that is 1085°C for copper and 660°C for aluminium, machinery needed to do this would be insanely expensive and would need to be done to the IHS detached from the cpu as that gets ruined at around 115°C i think, it would be better for enthusiast grade heat sinks to carve out an IHS in their blocks. but that would be made for mainstream processors only 8700k, some intel hedt and amd threadrippers
Edit: selling custom IHS integrated heatsinks with LM applied and nail polished is a small and probably fairly inconsistent business to invest in buying a well binned 3790k kit, very few people would upgrade till an 8700k which showed significant gains worthy of an upgrade you would run dry for a few years especially the premium you would ask for such a service people would use these things for a long long long time i know people who are still using i5 2600k just because majority games are poorly multithread optimized
AMD could collaborate with EKWB would be great TR2 Liquid and Navi 96 Liquid. Intel have too much ego to collab
Edit: selling custom IHS integrated heatsinks with LM applied and nail polished is a small and probably fairly inconsistent business to invest in buying a well binned 3790k kit, very few people would upgrade till an 8700k which showed significant gains worthy of an upgrade you would run dry for a few years especially the premium you would ask for such a service people would use these things for a long long long time i know people who are still using i5 2600k just because majority games are poorly multithread optimized
AMD could collaborate with EKWB would be great TR2 Liquid and Navi 96 Liquid. Intel have too much ego to collab