It really is awful, and it seems like most people just don't care, or don't even know that they could care. Perceived latency was a bit motivation for me to ditch macOS last year and go back to Linux. I haven't got benchmarks to prove how it felt to me, but it felt like everything has become spongy and asynchronous. Even with a decked out iMac and fast SSD, it feel like applications don't launch immediately. There's enough lag time that I sit for a second thinking 'did I double click or not? Did it launch and then crash? Oh, here it comes'. Keyboard input feels laggy.
I hate that more and more things are becoming software controlled. "What Andy giveth, Bill taketh away" is not a law that I want to apply to machines that can and should continue to function instantaneously.
