Another Look at Deep Dark Portals and Use

The TLDR; Overworld-type Portals that go to another specific Deep Dark Portal far away.

They are in fact, still portals. But why?
When turned on, they link back and forth to each other. Twin portals that span a long distance, maybe a minimum of 5000 blocks. Traveling far distance right now is fastest with Elytra in the nether, then making a portal on the roof. I think Mojang would want a more thematic method for long distance travel. Especially if they develop more rare features and biomes, covering more distance will be more important. A minimum distance prevents portals from being potentially useless. They're already big enough for a ghast. They won't cross nether portals, so you can use them along side the Deep Dark and repurpose the area as a useful remote hub.

The thematic and unique way to turn them on
The Warden guards the portal based on on sound, because sound is what activates the portal. You must bring 2 allay to the portal, play a specific sound disc on a juke box somewhere near the portal. The allay listen to the music, do a little dance, then activate the portal. This gives extra purpose to allay, and to collecting music discs. Each disc acts like a key that is tuned to the portal. This activation method is thematic to sound that the allay and the deep dark biome work with. It justifies everything and repurposes low or no use features in the game. And all the assets are already in the game.