I cut my teeth on black-and-white, DOS-based, 2-Dimensional SuperCalc 4 and was immediately hooked on the whole idea of spreadsheets. When 3-Dimensional SuperCalc 5 came out, it was the best thing ever! Excel has NEVER been properly 3D!
I then had to use Lotus 1-2-3 v2, and it seemed like a major backwards step (it was). Astounding to me since it was the overwhelmingly dominant market leader. However 1-2-3 v3 WAS properly 3D and redressed the feature balance, but when its Windows version came out (just as Windows 3 was starting to be used) it was so clunky and buggy and slow is was virtually unusable whereas Excel had a really slick, mouse-friendly UI. Therein lay the reason for 1-2-3's demise and Excel's rise to dominance, IMHO. The obvious choice for people who loved the concept of Windows was a GUI-centric spreadsheet, and Excel (having started on the Mac) was just that. It wasn't that Excel was the best at spreadsheeting - it certainly wasn't, and it might not even be now.
I was a trainee accountant at the time and spreadsheet expertise plus general IT savvy) was my competitive advantage...
Lotus Improv went one stage further - but it was too little, too late. I actually bought myself a copy of Improv just to try it out, and I was impressed. I still have the install floppies...
Mine's the one with a huge stash of 1990's business application floppies in the pockets!