Microsoft didn’t put Excel on the Mac to ‘test them on the graphics interface’. Microsoft was into Mac software in a big way, and Excel and Word were huge hits in the marketplace. The Mac was an extremely popular platform back then.
I was using personal computers since 1975. When the Mac came out in 1984, I was selling computers to help put myself through college, and I was studying computer engineering.
The Apple II WAS in lots of businesses. Visicalc put it there. Visicalc was the program that caused the phrase “Killer App” to enter the lexicon. Businesses were buying Apple IIs for no reason other than to run Visicalc.
Lotus 123 appeared on the PC, and as much as the IBM name it helped the PC enter business in a big way. The spreadsheet was THE app to have on a PC at the time, and 123 was king for a number of years.
But the Mac and Excel were strong competitors right out of the gate (well, Excel took a year or so after the Mac was released, but it was an instant hit). Most people I knew thought Excel was superior to 123. I used both on a daily basis, and I thought Excel was superior. The GUI and mouse interface was just made for spreadsheets, and it changed the whole experience. I knew lots of people who abandoned their PCs and bought Macs simply because they felt the Mac has a superior spreadsheet.
When Microsoft created Windows, they knew they needed a Killer App of their own for it, so they ported Word and Excel, and sales took off. I remember when Lotus was the giant among software companies, towering over all others. But Excel ate their lunch. Lotus took its sweet time porting 123 to Windows, and by the time they did Excel was already outselling 123 by a pretty big margin. Then they screwed up their first couple of Windows releases, and were pretty much done. Borland came out with Quattro, and a few other spreadsheets appeared, and by then the market was pretty much Excel, then everyone else all lumped together.
The user interface for Excel was much, much better. Excel was smart enough to detect which cells in the spreadsheet to update, where 123 simply updated them all, all the time. That made Excel perform much better. Excel had formatting tools for the sheet so you could change fonts, add borders, and in general make really spiffy looking reports. Excel, with its GUI front end, had more cells visible on the page. The mouse made selecting them much easier. It was simply a better product. The market agrees with me. Excel and 123 went head-to-head, and Excel administered a royal smackdown on 123.
Word bears almost no relationship to Wordperfect. It never did. Even before Windows, Word used a quasi-graphical user interface with a popup menu system that you could tab through, whereas Wordperfect had a huge collection of keystroke combinations you had to memorize. As I recall, Word had a better WYSIWYG interface, too. Wordperfect might have been more powerful, and it might have been better for power users, but Word was much more accessible.
I’m curious why you think Word ‘ripped off’ WordPerfect? What did they steal, other than the concept of a word processor itself, which was hardly a new concept?