Apple does not aspire to be a niche company and never has, though they ended up that way for a few years in the 90s. Apple is out to change the world not to pleasure a very small group of geeks. While it may be neat to imagine what Apple's engineering prowess could do for you, it just isn't going to happen.
Btw, what exactly do you think Apple could contribute to the 'desktop replacement' category that current entrants haven't already accomplished? Apple's hardware skills lie primarily in miniaturization, battery life, quietness, and aesthetics, which are all things you don't care about anyways.
I never said that Apple aspired to be niche, although they were comfortable being that for a long time, as they covered (and cornered) the high(er)-end PC market.
I am not using my imagination too much here. I am mourning the
loss of devices with capabilities
they already produced. Especially products that to this day have absolutely
zero comparable alternatives in the market (like my treasured 2011 17" MBP). It is highly disappointing to watch a keynote expecting an update on your favorite Apple product only to find out it has been discontinued. So it's not, as you say, "neat to imagine what Apple's engineering prowess could do for you". It's sad to visualize what Apple's engineering prowess
had already been doing for you, but won't be anymore.
Apple left the desktop replacement market when it killed the 17"MBP, as it was the only entrant in the space. The 15" is NOT an alternative. They replaced a desktop, umm, replacement with an ultra-portable. Less capacity, less flexibility, less ports, smaller screen.
Not everything needs to be miniaturized. A bigger screen is more useful (i.e.
visible) than a smaller one. When it comes to this you cannot replace bigger with smaller. More hard drive space follows the same concept. One can make tradeoffs based on needs
if the products exist. Apple kills products and leaves you with a big, fat nothing to replace them.
I am, and have been, an Apple customer for decades. Of course I care about aesthetics (
which Apple customer doesn't?), quietness (I'm a musician), etc. For you to say that I don't, when you don't know me, makes you come off a bit jerk-ish. Perhaps you don't mean to do so.