A quick glance at the orchestra’s schedule…
https://www.wienerphilharmoniker.at/en/konzerte?v=08-07-2022&ia=f&iv=f&sm=t
… beginning July 28 finds that the musicians are doing something virtually every day for the month of August: several operas/numerous performances with various conductors; concerts, invariably given twice, with Barenboim, Muti, Nelsons, Salonen (then on tour with him until September 8) and Thielemann; plus chamber-music recitals. Not forgetting rehearsals. Of course the VP has a pool of players to share the load, but even so. On September 16 the Musikverein season begins, Zubin Mehta presiding, with Martha Argerich.