What I absolutely do not miss are Apple's constant crappy UI/UX changes and progressing configurability deprivation delivered under the umbrella of secretive security updates.
With Apple I had to choose between security and stable UX. No iPhone or Mac felt "mine" in recent years. I still use iPhone (lesser evil thing) but replaced MBP with ThinkPad (FreeBSD always had good support for ThinkPads) and am not looking back. I don't miss eye-candy software, designer hardware and I cherish configurability and that my computer is "mine" again and feels like a tool not a toy. Due to macOS' BSD roots, large part of my userland remained almost unchanged.