Meh, Stern's fans need to remember that he's 67 years old - past the age when many people are fully retired. If he wants to take 2 months off in the summer to spend time in the Hamptons with his wife and their loads of rescue animals, so be it. Think about Johnny Carson back in the day....for YEARS (starting in about 1980) the guy only worked 3 days a week with a guest host 1 day per week, and a rerun (or "encore presentation") on another, and also got 15 weeks of vacation with various guest hosts filling in over the years...While also making $25 Million per year.
The story in the Guardian in the link above states that fans are angry, some are threatening to cancel their subscription to SiriusXM, and others are upset that Stern already takes a lot of time off and gets paid $17 Million. Great, then let them step up to the plate, put in the time and years of work he has to build the audience he's got and the salary he commands, and then they can come to the studio in the middle of the night, 5 days per week, 52 weeks per year to entertain the masses.
In my experience listening to Howard 100 and 101, aside from the few hours per day that he's live, much of the content is repeats and reruns with some shows hosted by other people on 101. Stern has years of old shows archived, and they could easily fill 2 months with archived guest interviews, in-studio antics, calls with the "whack pack" and other generic content. Stern's show doesn't need to be live or current or topical to be entertaining and funny, regardless what the armchair quarterbacks want to say or how loudly they want to moan.