Robin Harris, ZDNet:

The impressive performance and battery life gains of the new M1 MacBooks have created a historic discontinuity in the normally placid resale market. Should you spend $800 for a one year old MacBook Air when for $200 more you could get a MacBook Air with several times the performance and 50 percent better battery life?

Can’t imagine the new M1 Macs aren’t cratering the used Mac market. That said, this is a once in a generation event. The M1 is a huge performance leap, one we haven’t seen in a long time, and the market shearing effect is the cost of that leap.