People are always searching for the next performance improvement. The next tiny little speed boots in processors and systems. This is obviously a good thing on its surface, but it brings up a few issues
Firstly, these innovations in hardware should have been used to allow for innovations in software, and give us functionality that wouldn't have been possible otherwise.
What actually happened is that people just took it as an opportunity to be lazier. We've got email clients and word processors that now use more resources than older computers even had! We've got browsers that use 10+ times as much. And it's not like they're really doing much different than they were in the past. Okay, maybe you could make a case for browsers doing way more with javascript, even though a majority of that is pretty unnecessary like google analytics tracking or some bloated framework, but has email really changed that much? Word processing?
Secondly, It seems that performance gains are sometimes chased without regard for security and safety. Obviously not always the case, but it happens. I forget the source, but some anon back during the Spectre/Meltdown freakout was talking about how the issues may have been caused by Intel creating stuff in an unsafe way in an effort to increase performance, which would explain the performance drops that came with the patches. I'm not too sure how true that is, but if true, it's an example of this.
A more long-running example of this would be OS design. It's no secret that Microkernels have innate security benefits over monolithic ones. However, we don't exactly see microkernel OSes used everywhere, do we?
>Inb4 Intel ME joke
When disadvantages of microkernels are brought up, or arguments against them are discussed, the big talking point is always "Muh bad performance! Muh IPC overhead!". But two things. First, are you really so fucking desperate for that next performance high that you will sacrifice security for it? Second, the performance hits apparently aren't even that bad, at least on L4.
I don't really have an end to this. Just wanted to rant a bit.
Also, OwO