> But replacing a Macbook M1 with a Thinkpad only makes sense if the Thinkpad is better in some aspects, not if it's just good enough. Otherwise you would just keep your somewhat better laptop and replace it later if you ever have to, right?

Being able to remove the SSD (to recover data), to easily replace parts and repair the computer (especially when travelling a lot), to keep control and ensure a long-tife to your machine (rather than being stuck with no software upgrade when Apple decides the machine is too old), having better connectivity (hdmi, ethernet, sd...), etc. All of those are aspects where the Thinkpad is better than the M1 and can effectively be considered as upgrades ! Raw CPU horsepower and battery life are not the only criteria that matters. (and maybe once the author realized that, he also considered it was worthwhile to sell his M1 while it still had some value on the 2nd hand market rather than keep it and lose all the value if anything happens to the machine that is not easily fixable)