I don't know the X13, but I have lots of experience with old Thinkpads. Keyboard replacement really used to be super easy:

Turn Laptop over, look for the screw holes with a keyboard icon next to it, remove those screws with a Phillips size 1 screwdriver, flip over, open lid, slide keyboard up and lift out, unclip flex cable, then do the reverse steps with the new keyboard.

After a while, Lenovo started using more clips and fewer screws and things started to go downhill from there.

For regular users with a consumer laptop, a damaged key or keyboard means:

Laptop defunct. Use an external keyboard if not affordable.

Used my X220 for ten years, handled it with care, but after ten years a new keyboard was a nice uplift. You can also switch languages but especially also the layout between ANSI- and ISO.

Buying an Apple device with ANSI in Europe? Pain. ThinkPads? Buy anything. 30 EUR and new keyboard.

So even after 10 years you didn’t need a new keyboard, you just wanted one? I think you’ve proved the GP’s point.

How many people use a laptop for ten years?

Er, exactly! Most people replace the entire machine within that time, so they still don’t need a replaceable keyboard. You’re now arguing with yourself.

I mean, the irony is that the keyboards most people associate with failing are the Apple ones (2015-2020).

... Which are nearly impossible to replace, and are what the modern Thinkpads are trying to emulate.

The old X13's would almost never fail, so replacing them was never a consideration.

(also, screws are not that annoying, but I agree with the rest, most companies aren't/weren't replacing keyboards on laptops)