I tried to do that on my 9343 and pretty sure I ended up breaking one of the clips on the aluminum case. I got it back on and after reseating it a couple of times there's no longer a visible gap once I get all the screws it, but there's a spot on the back of the laptop where I can press down and here a slight clicking noise, like a latch is trying to catch somewhere but can't.

Just saying, removing some of these things can be more difficult than the Youtube videos or internet guides would have you believe.

I haven't used Dell really, but in many laptops, it's usually quite straightforward.

FWIW I changed the broadcom wifi on my 9343 for Intel and did not have this problem.

with the newer XPS 13s the wireless chip is soldered on.

Ah, that's too bad. But it might have some mPCIe extension slots? So you can just plug in an additional card.

Nah. The 9370 is basically fully soldered down with no expansion - the only exception (if I recall) is the SSD, which I think can still be swapped for now.

That's bad, especially for developer oriented laptop.