We should just accept the euphemism treadmill is an iron law of the universe and every 10 years, we come up with a new term for insiders as the old term gets degraded.

The problem now is people use "agile" to mean anything from the 2001 agile manifesto meaning of the term to the 2024 F500 meaning and that's too long a span of time so the word has lost all communicative value. You can either engage in a fool's errand trying to drag the word back to the original meaning or accepting reality and letting people have it and come up with some new term like "katana development" or some bullshit that means essentially the same thing.

The "Observability" crew are good at this, I feel like every 10 years, there's a new coat of paint on essentially the same basic SRE concepts. Like how we went from Oriental to Asian American to AAPI, the mental burden of keeping up with these language changes serves as a basic shibboleth to who is paying attention enough to developments in the field.