Agreed. Don Young will be in the House until he is carried out in a gurney. He will not lose, even if Dan Sullivan goes down to Al Gross.
Young did worse than Dunleavy in 2018 and is doing six points worse (in terms of margin) than Sullivan in this poll, so it’s not exactly impossible for him to lose while Sullivan wins narrowly, especially in a massive Democratic wave.
Yes, it's possible for Young to lose, but I personally doubt it, given that he survived both 2008 and 2018. If he did lose, he would be the first Dean in almost ninety years to lose a general election, since Gilbert N. Haugen was swept out of office in Roosevelt's 1932 landslide.