This proves to be peculiar not to the M1 series alone, but to the notebooks Apple has manufactured ever since it voted USB 2 off the island: I purchased a little accessory that affixes limpet-like to the two Thunderbolt/USB 4.0 ports on the left side of the computer, and, on the other side, yields up a Thunderbolt port, three USB 2.0-compatible ports and two card reader. Works like a charm except…it kills the WiFi. Since the internet connection had behaved flawlessly until the first time I mounted the device, and since I took the trouble to ascertain that my dodgy service had not gone down, as it is prone to, mere minutes were required to isolate the problem, which subsequent online inquiries indicate to be a “known issue,” and one which Apple, with its lofty disregard for these things (Bah! Why are you people even bothering with these deprecated technologies?), leaves perplexed users to discuss in the company’s forums, not deigning to weigh in.

Not a dealbreaker but, as I say, a minor irritant.

cordially,