I believe the Logic team are still based in Germany, where the original Emagic team that produced Logic were based, so it's not that they are languishing, but an intentional decision has been made (either by them or Apple) to keep this structure.

Logic has such a long history, it's not surprising that it shows it's age, and has 'weird' behaviour that you wouldn't choose today. It's got stuff in there from the early 90s, as it started out as a midi sequencer before pulling audio into the product.

Apple bought Logic over 20 years ago. I’d be surprised if it shared any code with the pre-acquisition version.