There is a certain amount of wank factor in mechanical keyboards. But if you are a high volume typist or heavy keyboard user, a keyboard that suits your typing style (with regards to springiness and feedback) absolutely helps.
If you primarily just use the WASD keys a few hours a week with a bit of half assed sorta touch typing in between then they’re not really needed.
An electric Dash-8 equivalent with 20-40 seats would be a game changer on regional routes.
The engines are the highest maintenance and cost items in aircraft. Electric motors should* drastically reduce that. Regional/small use routes are often on razor thin margins, anything to improve those margins will be taken on board very quickly.
*Perhaps battery maintenance replaces that cost with a rough equivalent, I don’t know