x86 architecture is now proven to be a minefield. It has too many instructions, being a CISC instruction set (something that was obsolete in the 90s but was kee

x86 architecture is now proven to be a minefield. It has too many instructions, being a CISC instruction set (something that was obsolete in the 90s but was keept for backward compatibility with older software). This means that to make efficient CPU the manufacturer has to do a ton of optimizations. These optimizations have resulted in most of the bugs we have seen. Contrary ARM or other RISC instruction set are more simple. Being more simple they rely on compilers being more smart to generate optimized programs (something we have to this day). For this processors are more simple and straight forward, they don't need all the complexity of an x86 CPU. For this reason they are also more efficient since they don't waste resources doing useless operations. Of course vulnerabilities can be everywhere (there were a few also on M1, tough not as impressive like these one, they were mostly stuff nearly impossible to exploit|). But recent times proved that particularly on x86 chips this is a real issue.