Purdy looks amazing... but there is no reason to put all of our eggs in that basket. He will probably start for 3 or 4 years and go on the the NFL.... but that doesn't mean that you don't have backups... if he improves he may be a prospect next season...
I think Purdy starts the rest of his career here but I agree, we need someone else to be ready with actual meaningful playing time when Brock gets dinged up.
Also, I would caution fans to remember our QB history. Just because Purdy looks like a sure thing, so did Jantz, Barnett, Richardson, Lanning, Park and Kempt at times and we all know that worked out. If CW writes a column this summer saying that “this is Brock’s team now” I am going to put 5k on Brock starting 5 more games and fizzling out. Those columns have been the kiss of death it seems like.