No they don't, and never will, as you cannot define best.
They probably don't use the BEST in anything.
Best screens?
Best SSD's?
Best CPU's ?
Best Graphics cards?
What say Steve Jobs thought was best for him was not best for others.
Likewise what I think it best for me is not best for you.
Slapping a laptop GPU in a 2000+ dollar machine on your desk (iMac) for me it not best. It's dam shoddy and poor.
No. They make the best overall laptop, the best tablet, the best phone, the best "mobile workstation", the best platforms.
Making an AIO that bitchslaps every single AIO from every single OEM on every speclist while charging the same or less is amazing.
So they, they slapped the most powerful GPU that anybody could slap on an usable AIO. Dell couldn't do it. DO they even use something other than intel HD GPUs at all? Doing that, with such a small (volume) device is great.
There's some impressive thermodynamic study in there. But then again, for you, a product is just the sum of it's parts. But even for such limited view, Apple does some incredible and unmatched things that anyone with at least minimum knowledge of design and/or engineering and/or science can admire.
Of course, by your post, I honestly do not thing that you fit in that description. Maybe you do something else and other products fit you better. That's fine.
But then again, why are you even posting here?