Well, the world is fully homebrew, my brain's creation, so I think that would be too much effort to migrate everything... Maybe some downtime... Dunno, now I'm planning to check the new rules and decide if I'm going to use some of them.
I'm running a newly created campaign (2 sessions yet), and my players asked, if they should check the new contents, or am I planning to migrate to the PHB 2024 edition.