Hello,
The RISC-V, has its drawbacks. It has a short history compared to Intel and ARM, and the architecture is not yet sophisticated. Since Intel and ARM have dominated the CPU market for decades, most existing products are optimized for these CPUs. In addition, Intel and ARM are responsible for everything from CPU development to testing and manufacturing, and can provide highly reliable CPUs to customers. And we have not to forget about innovation of companies such as Intel, since you can notice it with the following innovation from Intel on the following video:
2D vs 3D Stacking: Intel’s plan to beat Zen 2
https://www.youtube.com/watch?v=26EzYDBNwLU
Thank you,
Amine Moulay Ramdane.