World of Warcraft: Legion released on August 30, 2016.
Patch 7.1.0
“Return to Karazhan”
Release date October 25, 2016
World of Warcraft: Battle for Azeroth released on August 14, 2018
Patch 8.1.0
“Tides of Vengeance”
Release date December 11, 2018
World of Warcraft: Shadowlands released on November 23, 2020
Patch 9.0.5
Release date March 9, 2021
Less than two months for the first content patch in Legion, and roughly four months for the first content patch in BfA.
The first patch for Shadowlands is a systems patch and is coming almost three and a half months in. The first content patch isn’t going to be released until the expansion is 7-8 months old.
Right back at you buddy.