If you mean only the mega-concerts, last one was Madonna in Miami, about 2 years ago. We hated it. She started a full 2 hours late, with no explanation or apology, and the show wasn't that great. We'll never do another Madonna again.
In the last few years I've seen Cher, Bette Midler, Liza, who all gave better performances, in my view, my favorite being Midler. Who in her 60s is a positive Energizer Bunny on stage, funny & witty, actually able to spontaneously interact with the audience (must be a leftover from her Continental Baths days). And they all started right on time, BTW.
But we also attend lesser concerts all the time, and recitals, not counting those given in private homes. Most recent one was about 4 weeks ago, arranged & directed by a good friend of ours, and we attended sitting with his partner.