It was implied by the phrase 'transformed the ways everyone used computers'. True, to younger computer users MacWrite would be the most familiar of the three.

It was implied by the phrase 'transformed the ways everyone used computers'. True, to younger computer users MacWrite would be the most familiar of the three. However, in terms of total unit sales and percentage of users for their day, MacWrite was practically rounding error in the word processor market. It was WordStar and then WordPerfect that dominated (and therefore 'transformed...') until the early/mid-90's when MS Word took over.