Like AMD said long time ago, Threadripper project was just side project for some AMD employees and AMD only let it happen if:Hobby or not it's no excuse breaking compatibility with X399, then introducing TRX40 along with much more expensive 3000 series TR models and then not releasing a single upgrade for TRX40 owners. And even if they had released 5000 series for TRX40 then I fear prices would have been higher that 3000 series anyway.
- It's cheap
- It does not affect badly on other products (eating resources etc)
Basically that means Threadripper will have limited support. Either accept that or buy more expensive Epyc. Simple.