"No - the difference is MS never locked out all competing software like Apple and Google do."
It is true MSFT (like everyone else) never actually completely blocked Lotus or Netscape, for instance, from building software for Windows... but the steps you outline (optimizing their OS for Office/Outlook and vice versa, lack of documentation for integrations, bundled discounts, copying and giving away competitor's software with the price of Windows (Netscape), etc did exactly that in practice. Until Google Apps came around, Microsoft had a 95% market share in productivity. Do you think that was just the free market at work? In theory anyone could write apps for Windows to compete with Microsoft, in practice they could not. Microsoft had to work it that way just to keep the regulators off their backs.... This isn't even debatable. There was a year long anti-trust trial. Microsoft was declared not only a monopoly, but a monopoly which abused their dominant position to stifle innovation/competition.
Google and Apple don't lock out competing software. You can run all of the Office applications on Android or iOS or Macbook or (view browser) Chromebook.