Aside from aesthetics, I also want to re-case them for better airflow than what's in the laptop body. There can be quite a lot of sustained performance to unlock this way, as laptops thermal-throttle a lot compared to servers and desktops.
A slightly less-performant server is better than no server :)
I gave up on worrying about those details - just installed ProxMox, set it on a shelf in the basement, moved on. Works great for the tasks I'm running.
Well, it depends on what you use it for. I was thinking about using it for distributed workloads which is more intense than average.
I was even thinking about how much mileage could one get from a rack of old laptop logic boards. Gaming laptops sold for parts are much, much cheaper than "real" server hardware. It appeals to me because of the reuse aspect as well.