Haven't they? Tahoe was released which had quite a negative reception, widely considered a regression in terms of performance and UI/UX, while Linux has been gaining significant traction (especially in the gaming space).

macOS always had terrible UI and accessibility, it's their trademark feature. I thought that's what people liked about it.

Windows emulation did see some improvements with Valve's sponsorship, but I wouldn't really consider that significant, and it's not like mac has any comparable technology anyway.