snow plow WILL carve grooves on the asphalt on worst case scenario
I don't see a problem with that. When I had a CRT I would use any old glass cleaner on the screen to get the muck off it, never bother about finger marks, etc. On my LCD with the strange flexible(ish) screen I take a lot more care! If you use brute force stuff designed for old tech on your new tech you are asking for trouble, and if you can't change that brute force you're never going to advance. Thus changing the ploughs makes perfect sense (and trivially cheap compared to the cost of the road) for the implementors. Those with a grudge won't see that using a forge to make ally parts is silly.
I was trying to make point about their awesome skills for solving problems they have created themselves by doing certain things in certain way. It's not just about the ploughs they have to change. They have to change everything. When does a solution create more problems than it solves?
Get plasma screen and it has tempered glass
That tempered glass protects the fragile plasmas to some extent, however it also creates really annoying reflections even if it's flat. Plasma screens are awesome when there is no sunlight entering the room. Just be careful with that tempered glass, even if it's hard it might shatter really easy. See? Tempered glass solves every problem!