CAT-THE-FIFTH
Not surprising when laptops are more convenient,and the costs of desktops are starting to get a bit sillier in comparison(especially if people build them too) and you need to add periphery costs(monitors,keyboards,etc).
True enough. You can also get pretty powerful laptops (at a price) or ‘average’ ones petty cheaply.
They're not always more convenient, though, and the cost comparison should reflect that upgrading a laptop more than minimally gets expensive because you end up replacing all of it, at once. One of the biggest single advantages of a desktop/tower is only replacing what you need, like video board.
The other is spec'ing the machine to your specific wishes, not what manufacturers want to sell. I'm writing this on an MS Surface Pro, with a 17" Dell laptop five feet away, having just been researching chip, mono, GPU (maybe), drive options etc, because my old PC has been kept going with a change here, upgrade there, since Q6600's were state of the art.
In other words, don't buy a Ferrari when you need a 4x4, and don't buy a 6.6L V8 Rolls when you want an EV.