"Craft beer
in a can will not age gracefully. Even in a bottle, while it will probably be fine, how much light exposure are the bottle getting, have they been left out in the sun at any point etc."
A modern beer can, on a newer canning line, is superior to a bottle in every single way. This debate about bottles being better than cans is from years ago. Cans and especially the canning machines have come a very long way in the last 15 years. That is one of the many reasons why almost every brewery is slowly switching to cans.
In regard to aging beers, there are a many important factors. The biggest enemy in aging a beer is oxygen. Oxygen gives beer a cardboard, paper flavor or a very raisin-y flavor, eventually it makes the entire beer taste like soy sauce.
As you mentioned zero light in a can so no skunking, although brown bottles stored in a dark cool place don't experience much of this. But clear, green and other bottles do. Bottle caps slowly leak oxygen in over a very long time and is why you might see a oxygen absorbing material in the under side of some bottle caps.
On the flip side one majorly common way a can will go bad in aging is from a seal alignment issue. This is especially common in smaller breweries as automated seam inspectors are quite expensive. The seal will visually look great. But if you tear it apart and measure the folds its quite common for them to be a little bit off, which can slowly leak out carbonation and in oxygen.
I'm a huge fan of packaged on dates for beer.