It's a lot of fun and has made many new techniques for digging and exploring possible.
Also adds some fun challenges when server get's laggy. Kinda like IRL, you never know
when you glide into a windblast :)
Combined with fly beacons you can get extra speed boost ;)
I like the way this allows each server to slightly adjust the way mobs work.
E.g. override the wayfinding portion.
An api helps that not every added mob needs to learn from the same mistakes and can profit from bugfixes found in other mobs.
Nice variation to mapping kit. I jokingly call it "sonar" because it 'sees' through walls.
I don't use map much, but when I do, I like to have it on this mode, especially when underground.
It can show that dungeon I would have missed otherwise.