I was considered a Lotus 1 2 3 “guru” in the day. And then when we migrated to EXCEL, converted all the Lotus data in our office into EXCEL.
when I went back to college, my professors paid me to convert their data as well. I got pretty skookem at EXCEL, but as I moved up in management and had to teach my assistants how to create the spreadsheets that we used, my skills began to fade. It finally reached the point where I no longer created spreadsheets and had to go to my assistants to do it for.
I can still prepare basic ones but noyhing elaborate.
I cut my teeth on VisiCalc long before Lotus and Excel.