Modular ports are good, but I’m not sure I need to be able to hot swap them.
Larger port module plates that bolt into the sides of the chassis with a few screws would be just as good from a longevity standpoint, would enable better rigidity, and would allow the FW13 to host a considerably higher number of ports.
A screw or two definitely wouldn't have impeded the handful of times I've moved my 16's parts around, not even in the slightest, it's just not that frequent. And I don't usually carry other kinds of ports + wouldn't be able to have the screwdriver too, it's usually "I have them all" or "I have none" and then all I can realistically do is swap sides. I'd have zero complaints with some standard screws.
... but tool-less lowers the barrier to literally zero, which is pretty big when you need it. It's a very different mental-space: absolutely zero concern.
... and if they were smaller, they'd be incompatible, and it'd be harder to build custom ones due to even less internal space.
Larger port module plates that bolt into the sides of the chassis with a few screws would be just as good from a longevity standpoint, would enable better rigidity, and would allow the FW13 to host a considerably higher number of ports.