It must have been somewhere in the early 90's when I first encountered Excel 4 on a Compaq 386s (
@Johnny C : indeed, good stuff)
After some trial and error, I discovered the Excel 4 macro sheets, and oh boy, it was a whole new world for me
Suddenly, I could automate many tasks in my job... I spent hours programming, but saved a multitude of hours.
My Excel knowledge took a big leap when I discovered the MrExcel website, a site with so many questions and even more responses.
(On October 13, 2004, the site reached the milestone of 100,000 questions.)
My motto: if you have to perform a task for the 5th time, start thinking in the direction of VBA.
In short, in my case, about 30 years of Excel experience.