Do you know what these "security patches" look like, if we draw an analogy with the car market?
Remember the Dieselgate (Volkswagen) scandal in the USA?
What happened there? Volkswagen violated environmental standards in real engines, during real driving, and underestimated emissions in tests.
When they were pinned down, what could they do - reduce emissions, right? What happens to an engine that is forced to meet these standards? Bingo - the torque and overall peak speed of the car drops sharply. It got to the point that Volkswagen agreed to pay large sums of money to some buyers for turning their fast cars into pumpkins.
It was an international scandal, right?
But what is surprising is that processor manufacturers (together with OS manufacturers) constantly engage in such fraud - the buyer buys a processor with one performance, before the "security" patches, and then suddenly it turns out that it is up to 50% slower with the "patches".
Don't you think that most of these patches and updates are probably contrived and fake - just to create a reason to slow down the old series of processors in order to constantly sell new hardware? Especially when the performance growth curve per 1W becomes more and more flat and there is no reason to change hardware over 10 years...