"What have you learned in the past week that you’ll still care about in 5...
"What have you learned in the past week that you’ll still care about in 5 years?" - Shane Parrish
Few tech skills were useful for me for over 5 years. HTML, JS, CSS, C#, SQL.
Longer lasting? Concepts. OO, functional, design patterns, clean code
Longest lasting? Soft skills
Related: "Info has a predictable half-life: the time taken for half of it to be replaced or disproved. Over time, one group of facts replaces another." - Samuel Arbesman
Takeaway: Consider the likely half-life of the things you learn.