I don't agree with the old and stale - but to each their own. Old? Yes. Stale? That depends.
Point taken. It was much more the particular music they played and how they played it.
I definitely don't have a down on "old music" per se, but I couldn't raise enthusiasm for much of their repertoire or their style. I joined as an experiment, but the experiment didn't suit me, nor really did I suit them. Yes ... It depends.