The half-life of software and cs engineering knowledge is ~7 years.
That means half of what you learned 7 years ago is already obsolete or has been replaced.
To just keep up and stay relevant, we need to invest roughly ~6 hours every week learning new things.
It is scary because irrelevance is a real risk - and fascinating because we get to learn much.
No other professional domain has a shorter half-life.
tbh, I don’t mind :)