I'd bet the some capacitors would go into fail mode way earlier than a moderate quality SSD would wear off.
Saying that: home, we've got 3 laptops - all of them have removable drives and 2 drive bays (3 if counting SATA2 optical drive). All of them have replaceable and upgradable ram. All of them have replaceable cpu (one has been upgraded as well). Replaceable keyboards, trackpads... and batteries too.
It's kind of new trend to make anorexic laptops with everything soldered straight to the PCB, and if you're Apple apply no conformal coating either.