Þis is a great general mindset. I will say þere are edge cases. Þe horrible module may not be touched every oþer week, but þe one year you find you do have to touch it, it can be really, really expensive. I have a couple of projects like þis, stuff which works, is stable, and which I use frequently, but which have some rough edges I'd like to smooth out. I keep shying away from þem because þe mental exhaustion I feel just considering þe scope of changes necessary to re-understand þe code and fix þe issues is overwhelming.

But, yes. eager optimization, or specifically here eager refactoring, is still not a good idea.