The discussion starter was about the complaint that Apple might not make anymore Macs.
I pointed out companies that used to make PCs, but decided not to anymore due to market changes.
There are multiple business case studies about IBM's decision. They are strong now BECAUSE of their decision back then to stop making PCs and reinvent themselves.
Apple now has the most powerful and efficient mobile SoC, multiple custom chips. You can see them transitioning, preparing for the possibility of needing to switch business model.