"10x1y" means someone did the same thing for 10 years with no change or personal development. The learning stopped after the first year which then repeated Groundhog Day style.
I see a dual. Between 10x1 workers and 1x10 workers working at 10x1 companies.
Either way, doing the same kinds of things, the same kind of ways, more than a few times, is an automation/tool/practice improvement opportunity lost.
I have yet to complete a single project I couldn't do much better, differently, if I were to do something similar again. Not everything is high creative, but software is such a complex balancing act/value terrain. Every project should deliver some new wisdom, however modest.