Don't hide the full-width option from web parts!
This is really frustrating. I'm trying to use the Planner web part and it only has 4 columns, my screen is not ultra wide, yet it is artificially restricting the amount of horizontal space the web part is allowed to take up - even though I chose the single column layout. This causes the 4rth planner bucket to get cut off with a scrollbar. This is really annoying that I can't have an option to easily use the full-width of the page.