>but there’s nothing really limiting any other laptop on this front. You just use an external dongle and have the same flexibility.

Yeah, but thars another part to lose. I have tons of dongles and expansion bays, and have lost half a ton of them to the tides of school, work, travel, and carelessness. Most lost, some break because it's a huge portrusion out of your core machine. A few borrowed and never returned. One of them stuck at an office I got laid off from but never returned to post pandemic (but the severance hush money was worth more than me raising a fuss as opposed to replacing the $30 bay).

I don't need it to literally be plug and play, but I appreciate a more modular setup that is flush and stuck to the machine.

PS. Your link is 404.