^ Apple would transition eventually regardless, this is a company that always wants to shoot the middleman they previously relied on and there's countless examples.
They're not afraid to do transitions because that's part of enables sellers to compromise and go lower than they would otherwise, you know they can go through with anything, even if it's petty. To a fault everyone is a bit scared of what Apple can do against you if you don't reach an agreement. Even developers, with the Epic lawsuit thing you could tell, they were afraid to speak up. Apple is able to do a lot more than normally accepted without that tarnishing their image. And they also get away with doing LESS, right to repair? HP has shit image compared to Apple, but they do it right, every PC has a repair manual accessible for everyone and good repairability scores. As for polution? Apple is always in bed with greenpeace, bankrolling them and saying they are concerned with the environment and even recycle their own crap. All of this being no more than a narrative from someone that sells plenty things that have glued, unserviceable batteries and recycles less than 1% of what they produce.
They invest a lot less on education than Microsoft and others, certainly never drop their prices for such a good cause (they'll make cheaper and worse computers, if they need to and keep the profit margin they always had); they don't give a damn about the third world not being able to buy their shit and Product RED is just a show (costs zero money to do and doesn't even sell that well) as the company has no philanthrope/charitable vein whatsoever, unless it's down to giving computers and phones to reviewers that are nothing but sycophants and a Mac Pro to Trump.
In a lot of senses they are about as good as Facebook.
Examples of transitions done just because: Nvidia support being effectively blocked from the OS (not being a client is one thing, refusing to sign their drivers is another), discontinuing then dropping OpenGL/Vulkan support, telling PowerVR they are not going to use their GPU's anymore then poaching most people working there...
Dumping Qualcomm for 5G routers, moving a lawsuit against them because they wouldn't licence their patents at a reasonable price (try to make Apple licence anything...), invest on Intel's 5G router, pull out from buying anything, settle and make a deal with Qualcomm instead... Then buy Intel's 5G router division, because without clients it's suddenly for sale. LOL. These are all, Apple modus operandi.
Let's say it like it is, every company will suffer through some blunders once in a while, Intel did with Pentium 4/Pentium D and is suffering a bit now, AMD did with Bulldozer/Jaguar architecture, Nvidia did with Geforce FX 5x00 series, and so on.
Apple does as well, Apple maps was a fiasco, and some of their products have been quite unreliable. Whenever possible they try to blame someone else, but sometimes they increasingly have no-one to blame but them. Recent security problems, antenagate, phone battery problems, screen gloss treatment problems that have lasted for years because they want to do coating instead of applying a filter, the aforementioned keyboard reliability problem that effectively turned their laptop sales to mush for 4 years (and they tried to blame Intel for it - if the keyboard was made by a third party they would have gone through as many manufacturers as possible within 6 months). It's all part of a narrative.
Not to say Intel is not going through some shite, Apple doesn't owe them anything and if they want to jump it's now. But, they would jump eventually because it makes sense for them to be tied to a manufacturer whose roadmap doesn't have them at the center of the equation. One of the reasons to jump is actually that computers are lasting too long. A Haswell quad core CPU is not drastically different from a 2019 iMac 21,5", so dropping support looks bad. Apple machines were lasting 10 years. I assure you they won't from now on. 5 years tops, then 2 years of security updates.
If anything, it's quite a testament to intel engineering that Apple wasn't able to kick their ass sooner despite the fact they didn't make them center of the universe as far as clients go.