Intel had to swallow its Spectre issues straight forward and has done a good job of mitigation thus far. AMD got hit last summer with ZenBleed and Inception. Conversely. For Apple, this is as bad as it gets. ALL MAC M-series CPU systems are affected. Having dumped Intel CPU's for in house CPU's, MAC users with their shiny new toys now have their turn.
https://arstechnica.com/security/2024/03/hackers-can-extract-secret-encryption-keys-from-apples-mac-chips/
https://www.msn.com/en-us/news/technology/apple-s-unfixable-cpu-exploit-3-practical-security-takeaways/ar-BB1knlQL?ocid=winpstoreapp&cvid=25c4176a917a4ecebb2b3735cd1cfb1a&ei=21