The shifts taking place are all reminiscent of the shift from Windows to Apple that started in the late 90s. Back in the early 2000s we had Jony Ive channeling Deiter Rams and telling us how cool Helvetica was. And the "I'm a Mac" commercials beating us over the head with metaphor.
You talk about tech consolidation as something that emerged in the 2000s that killed the fun but consolidation has always been there. Technology is about making your life easier and consolidation is a part of that. When a product can reasonably be consolidated into another product, it often is. Look no further than Swiss Army Knives, the Leatherman, Telephone answering machines, boom boxes, or countless other technology chimera. Even your Meta Ray-Bans are a combination of the Humane AI Pin and sunglasses.
You wax poetically about the need for devices to feel personal, that's always been there. It still is but refinement often is about distilling something down to it's simplest possible form and that's where we're at with Smartphones. So the degree of customization is limited to cases and colors in much the same way as a Swiss Army Knife.
We haven't escaped the monoculture. Bambu Labs is the new 3d printer monoculture. Meta is the AR monoculture. Options like Linux have always been there, they just weren't cool. Gog for example is nearly as old as Steam.
What's changed is that we've slowly moved from running code on our devices to running in the cloud, which has made the choice of device or ecosystem less relevant. Linux is emerging as an option because Apple has grown to be more like Microsoft with age and they're both stuffing tracking and ads into every corner of their platform. They're no longer cool.
To me this article reads as soft elitism with a side of mid-life crisis.