So it's like, not just keycap? It's gone for good now?

I guess there's no incentive to make them more durable. You know this better than me, but I doubt corpos care about the cost of replacing those keyboards.

Just after I updated that comment I got another keyboard with multiple keys missing. I believe the keyboards are replaced for free as part of licensing them out.

I worked IT for a High School and kids would tear laptop keyboards apart. The school wouldn't replace them so I had to do my best to fix them. When I saw a keycap come off when I started here and they said replace the whole board I sighed with so much relief.