Deleting 10k hours of /played

I quit in shadowlands and just came back. So overwhelmed, new messy UI, 999 popups logging in, so much confusion.

So i decided to delete all of my characters.

My Warlock, Mage, Hunter, Priest. Warrior, Druid, Shaman. Rogue.

Combined of 437 days / 10,488 hours /played.

Im now starting over, level 4 priest in tirisfals glades relearning the game.

Will i regret?