I like having my terminal attached to my editor, but I don't like it integrated with the editor. Some of the integration features are cool, like clicking to view a file in the editor straight from an error message, but I always get frustrated with the integrated terminal's small size, and it's not convenient to resize it. Or it can slow down the editor when a lot of output is happening (VS Code). Sometimes it's a third-party solution that isn't well maintained (Atom, Sublime Text).

Ideally, I'd love a way to glue sets of windows together and move them around as one piece, without being a tiling window manager.