Stock didn't really move on this, but IMO this is a bearish signal for Apple--they're sitting on a ton of cash and can't catch up to OpenAI? Not even via acquisition? How far behind are their internal efforts?
Unfortunately very few Macs would be able to run anything like that since 8GB is still the base config for consumer models and I wouldn't be too surprised if 80-90% of all Macs sold in the last couple of years only have 16 GB or less.
Now.
As you correctly point out, their margins on RAM are quite high.
Apple's strategy is edge based AI using their superior proprietary chips, particularly in mobile.
So it makes sense to partner with a centralized provider too.
Look at Apple Maps.
Nobody has caught up to OpenAI, it's absurd to expect Apple to have done it simply because they have the cash.