More modern x86 comes with significant problems.
The minimum is now eight cores on a die for both AMD and Intel, so running a quad core system means staying on 14nm. You may loudly criticize holding back on a quad core system, but you aren't paying $47,500 per core to license Oracle Enterprise database.
The eight core minimum is a huge detriment for commercial software that is licensed by core.
This, and this alone, shatters your argument. Any other questions?