tl;dr: Intel processor architecture flaw allows unprivileged code to read any memory it wants, forcing true kernel memory isolation which is a huge hit to performance.
Probably a 5-30% performance hit to pretty much everything. AMD processors appear to be unaffected.
Intel's CEO just sold a bunch of his stock. Things are not looking good. I'm ticked because I just built an Intel machine. Overall, really irritating.
Contrary to popular belief, I have no clue what I'm doing.