Both should worry about getting usurped by RISC-V. x86 is getting cornered by ARM in consumer and data center. RISC-V is gunning for ARM. While ARM is open-is

Both should worry about getting usurped by RISC-V. x86 is getting cornered by ARM in consumer and data center. RISC-V is gunning for ARM. While ARM is open-ish, RISC-V is more open than both. When you're not the market leader, that's the strategy to become market leader. And it certainly helps that a major world power is putting in enormous energy to make their architecture the dominant alternative to "Western" architectures.