Absolutely. The GroupBox is an essential UI decoration that I create manually now that it's not available in toolkits. I put a checkbox on the outline with a label too, when the entire group of controls is related to a function that can be turned on & off... as used to be standard in many UIs, and very clear.

A related missing-but-important one is a proper TabView. I don't know who first passed off a row of plain buttons as a TabView (probably Apple), but it's trash because (like the lack of GroupBox) it does not demarcate what controls below it are ON the selected tab's view! I mean... duh.