We are still in tedious agreement. What I was referring to was not the music itself, which has as you say gotten deeper and richer and more thoughtful even as it has lost some of its youthful urgency, but the onstage presentation, which bundles their entire career together achronously "as though there's no difference between the work they did at 25 and the work they're doing at 40." (Emphasis added.)
No, on their albums I think Superchunk are doing what Al Green did for Memphis soul in the late 1970s: refining and perfecting the form after everyone else has stopped caring.
The albums on which they transition from early Superchunk to late Superchunk, Foolish and Here's Where the Strings Come In, are still my favorites.