I wish IntelliJ would sell git-only tool - their three way merge tool is the best I’ve used, and would gladly pay for a license.
That tool is so good because it leverages the entire eco-system of IDE it is running in. The resulting merge panel is as powerful as any editor window in the IDE. It has code inspections, it detects missing imports, it does everything.
It might be the case that ripping the diff/merge tool out of the IDE would result in way inferior product than we get when we use it within the IDE.
Otherwise, yeah it's amazing!