Not exactly the answer to OP, but when we had to decide what device to buy for my mom, we bought her an iPad. Best choice ever. Zero maintenance, it's fast, she can do whatever she needs and wants and it's light and easy to move. Drop some water on it? It's fine. Not even the cat can destroy it.
Yeah the point is with an iPad you don't have a keyboard to ruin with dust, dirt and liquids. Sure you can't literally dunk it into a pool, but the lifetime is extended compared to a laptop, if you are a person who's not good at taking care of your device.
I just assumed the Magic Keyboard had the same water resistance rating as its parent device. Turns out, I was unfortunately right: iPads aren't rated for water resistance, unlike iPhones; TIL.
At least the keyboard was kind enough to take one for the team. I never want to find out Apple's unit cost for those.
