I (mistakenly it would appear) thought that if I connected my 16 inch MBP to my new M1 iMac using a USB-C cable I would be able to do the migration over that hard-wired connection. But it appeared to have set up a peer-to-peer network that did the transfer at speeds of 50 Mbps most of the time, a quarter of that some of the time. So the migration of about 450 GB took several hours.
Does anybody know whether transfer over a USB-C connection is possible and, if so, how one accomplishes this.
I'm mostly just curious at this point since I hope not to have to do this again in at least several years.