Clutch stuck to the floor...

[Zenmervolt]

What about the idea that holding down the clutch wears out my knee?

Read the whole post.

In the end, if you want to sit with the transmission in neutral and your foot off the clutch because it's more comfortable, go ahead, but the reality is that you're not risking any mechanical harm by leaving the car in gear and you are potentially more able to react in an emergency if you do leave it in gear.

ZV