Alaska Airlines has announced that a new 100,000 mile loyalty tier will be added for 2022. This was announced in an e-mail to members stating:
For members who fly 100,000 miles per year, we’re also introducing a new tier starting in 2022. This will recognize our absolute top echelon road warriors and offer perks such as increased bonus miles, top upgrade priority on Alaska flights, lounge benefits, and more. Look for more details later in 2021.
At this stage we don’t currently know what benefits will be added for those who hit that 100,000 mile tier.