I no longer believe their “50% faster”, “2.5 times faster” nonsense - because that’s what it is, nonsense - they introduce obsolescence into their older machines via each OS update making these comparisons meaningless.
It now takes my Mac TWO SECONDS to close a Safari tab 
(Yes I have a lot open, but I have always had a lot open - this machine has 64GB of RAM and should be able to handle it!)
It really does show Apple does not respect their customers and is in stark contrast to others in the industry - our playstations and xboxes get faster and better with each update, not worse! Our TVs get faster and better with each update, not worse!
I am surprised there is no class action lawsuit against them about this, then again, is it really surprising given they’re all in each other’s pockets!!
Maybe ChatGPT can cobble together a competing OS 