I hope they invest some time in macOS, gosh it's become a right mess over the last 3-5 major releases - Tahoe is the worst of the bunch.
Macs make up 8% of Apple's revenue. That entire product line is basically a hobby compared to iPhone and its ecosystem.
macOS is a major part of keeping iPhone users on iPhones, and in turn keeping Apple users buying subscriptions.
When you look at the most profitable demographics in the market (e.g. “computers over $1000”) Apple has a huge percentage of that market in both revenue and marketshare.