But the company took a different tack today because of its emphasis on the rent-not-buy subscription model that it's aggressively pushed since January 2013. Typically Microsoft rolls out a new edition of Office as a complete package, with all-new - or mostly-new - applications rather than release bits piecemeal. 'This looks like it will be a journey, an evolution over the next year or so for Office on the Mac.' company's approach to software development. 'Microsoft likes to say 'It's a journey,'' said Miller of the Redmond, Wash.