Engineering work, like many other branches of intellectual work, does not have many of the properties of other jobs. So I don't share the ideal of a normal engineer doing normal work in their office hours.

I also don't buy into the 10x pushback, there's not only 10x engineers, there's 100x engs. Easy to prove, can you think of an engineer that adds negative value? That deletes tests, or breaks stuff? That adds left-pad to package.json? Or log4j? The bigger the org the bigger the damage. Boom, you have a -1x engineer, and conversely a +1x engineer. If they do a lot of damage that's a -10x engineer. If they do some damage and contribute a little bit maybe they can get into positive numbers, and you have a 0.1x engineer, therefore there exist 10x engineers (and 100x and 1000x and inf and -10x engineers.)

I do agree that performance is not quantifiable (or very hard to quantify) and that it is not a property of an engineer ( although the article suggests performance is a variable of teams or the org, but I would say it's a property of the engineer-product pair)