I was about to make a joke how poking around a 3 year old #angular project makes me feel like an archeologist, but now I'm thinking *necromancer* is a more apt metaphor.
Seriously cool that such a detailed update guide exists, seriously uncool that the checklist for going 9 > 16 is 89 points-long https://update.angular.io/?v=9.1-16.0
Angular Update Guide