IDK, Apple's brand loyalty is absolutely incredible. I know multiple people who will buy everything Apple makes, and if Apple doesn't make it they won't really consider it. Apple's strategy of letting other people validate markets and then coming in with a good product (like they did with the Apple watch for example) would likely not work for most companies, but it works great for Apple. They'd have to lose an insane amount of ground before they'd be at risk of being left behind. They also have enough cash that they could chase tail lights and do their not-original-but-better thing for decades.
Fwiw I do hope you're right though. I think competition is badly needed.
I probably fit into the Apple loyalist camp, I've currently got an Apple laptop, phone, tablet, smart speakers and TV and in the past I've also tried the watch, the AirPods and the iMac. I'm probably more tech orientated than the average consumer but, based on the products I've seen released outside of the Apple ecosystem the past year, it's the very first time in over a decade that I've been giving serious thought to switching. I'm thinking I can't be alone in this so I'm interested to see how this plays out.
Fwiw I do hope you're right though. I think competition is badly needed.