Use-it-or-lose-it tendency
Skills atrophy without practice. Fluency needs maintenance.
Cognitive and motor skills both degrade without regular use. The doctor who hasn't done a particular procedure in three years is measurably worse at it than the one who does it weekly. The language you don't speak gradually disappears. The mental models you don't deploy stop being available when you need them.
For operators, this matters in two ways. First, your own skills need maintenance. The technical edge you had three jobs ago is mostly gone by now unless you've been actively keeping it sharp. Second, organisations forget too. Lessons learned in one crisis fade by the time the next similar crisis arrives, often within just a few years.
The defence is deliberate practice and institutional memory. Decision journals. Post-mortems that actually get read. Training that's repeated, not just done once.
Examples in the wild
Companies that survived the 2008 financial crisis with discipline often forget the lessons within 5-7 years and repeat the mistakes in the next cycle. Institutional memory faded.
Investors who lived through a major crash are measurably more cautious for years afterward. Investors who didn't, including the next cohort, repeat the same mistakes.
Most skills you acquired in your 20s have substantially degraded by your 40s unless you've actively maintained them. The piano. The language. The math.
Use-it-or-lose-it tendency is one of the mental models we apply through real cases inside the Pareto MBA — a part-time program for professionals who want to think clearly about business.