Use it or lose it.
Skills you don't practise fade. Aviation learned this early: heavy reliance on autopilot can erode manual flying skills. Software teams are next.
Convenience
Stage 1
“It's faster with the tool.”
- You could do it yourself
- You choose not to
Reliance
Stage 2
“It's easier than remembering.”
- Doing it yourself feels slow
- Confidence starts slipping
Dependence
Stage 3
“I can't do it without it.”
- The skill is gone
- You find out at the worst time
Source: US Federal Aviation Administration ↗
Know which skills you can't afford to lose.