the seven year gap has to have been one of the most trying times for Phoenix and Edgeworth’s friendship, but it also solidifies their relationship as one they’re both dedicated to working at
up until Phoenix gets disbarred, he and Edgeworth are coworkers. there’s undeniably more to their association than just their jobs, but nearly every interaction they have—and each one we see—is anchored by a case. even when they see each other socially, there’s always the latest trial to discuss, some guise of “comparing notes” behind which they can hide their desire to see one another.
and then Phoenix is disbarred, and the only thing tethering them to one another is their mutual affection. the only framework in which they’ve known each other as adults is stripped from them. despite Phoenix’s ruined reputation, despite the loss of an excuse to see one another, despite the volatile and uneven ground on which they find themselves, their friendship survives those seven years.
sure, Phoenix mentions helping Edgeworth with legal work abroad, and Edgeworth likely plays a hand in ending the dark age of the law. and while the jurist system was no small undertaking, it’s not nearly the same thing as working alongside someone in your daily life. keeping up a friendship for seven years, even with the bits of legal work they took on together, requires significant effort—especially when one of you is raising a kid and likely depressed and the other is often abroad with a flourishing career.
this is all to say: I think Phoenix could have worked at the Borscht Bowl for the rest of his life and he and Edgeworth still would have found reasons to see one another. neither of them are willing to let that flame burn out, even when there is no cause for it other than sentiment