Marshall has copyright on his lyrics, you just said yourself patents and copyright are different things.

Sufficiently different rip-offs that don’t confuse consumers as being the original should be legal. They already are as far as copyright is concerned.

Many design patents should never have been registered, and should lose when defended in court. Design trademarks are a third similar issue.

Move New Years back to march 1st, then the Latin roots will be accurate again.

That’s a feature supporters of imperial thinks it has. Even if imperial/some special third option is better for guessing, the difference has to be big enough that it’s worth the hassle of having multiple systems or converting everyone again. If it’s not worth having two systems but it is worth converting everything , then you still have to keep or prove that it’s worth losing the conveniences of metric like 1 km = 1000 m , 1 L of water weighing 1 kg , water freezing and boiling at 0 and 100 °C