Thick? Sturdy? They're 15mm/0.61 inches thick. Most of that is used up by the base, the screen is a terrifyingly flimsy 3.6mm thin.
Comfortable? The key travel is 1mm. I'd hardly call that comfortable, that's a concession to thin-ness.
And they're not that fast just looking at power specs - the new processors are impressively efficient, but if they prioritized professional performance and effective heat dissipation over being skinny, just imagine what that efficient processor could do with 70% more power dissipation/heat removal.
Also, "fast" and "beast of a battery" may be true for now, but in a few years, when memory and storage are cheaper and faster, you won't be able to update, and when your battery starts to degrade you won't be able to click in a new one. Again, because long-term performance, upgradeability, and repairability have been sacrificed for the sake of thin.