Last November, while much of the luxury e-commerce sector was in free fall, Mytheresa’s chief executive, Michael Kliger, seemed sanguine.
In the quarter ended Sept. 30, 2023, the high-end e-tailer achieved another quarter of net sales growth, preserving the streak it had maintained since its IPO in 2021. It was faring better than its competitors: The same day, Farfetch abruptly announced it would not provide its usual quarterly results, all…