Zoom was disruptive in the market because the other options SUCKED - Skype, GotomyPC, WebEx, etc all did a lot of rapid maturing during the pandemic to catch up to Zoom, and this ‘bundling’ of Teams with Office has built user lock-in via Office 365.
Well played Microsoft, once again ducking a well deserved anti-trust suit. ‘Historic injury’ should count equally as ‘current injury’ for prosecution, arguably especially so if that historic injury is what created your current market share