Lots and lots of online articles about the very negative consequences of just applying the fixes (patches) to all modern cpu’s of last two decades . .
As I relayed at the last meeting, in early January after applying one of the patches to a particular haswell based Intel cpu (System76 Sable AIO), the machine would not complete the startup boot sequence. I had to reboot and select the prior running kernel (only happened twice in 18 years). This is unacceptable for the average user.
For the millions of business, govt, edu, science and similar users, the problem is way worse. All major cpu makers affected (Intel, AMD, ARM) for either Meltdown, Spectre or both. (Spectre has several branches).
For those in doubt, here’s a post by the worlds foremost computer science engineer – Linus Torvalds: