Osmo Vänskä and the Minnesota Orchestra began their Mahler symphony cycle for BIS in 2017 with the Fifth Symphony, and it’s now nearing completion; only the Third remains to be released. This penultimate disc of the majestic Eighth has extra significance in its own right, for it’s based upon the performance that Vänskä conducted in Minnesota in 2022, as his final concert after 19 years as the Minnesota’s music director.