And I know from first hand experience that those "not the corporate one" vendors that (often local) governments try to get their stuff from are not able to offer their products or services at comparable quality. Years ago my public university, via some half-baked initiative by the state in an attempt to protect data and employ local talent and whatnot, tried to ditch Dropbox and O365 etc. in favor of some locally made stuff. It was an unmitigated disaster, especially the absolute piece of shit that was supposed to replace Dropbox. On the rare occasions that it did actually work, it simply was nowhere near as useful or convenient or performant as Dropbox. As a result people avoided that shit like the plague and started sharing their files through other, arguably shadier platforms instead. Until they finally rolled the actually usable alternative that's in service now, the documents were hosted on all sorts of shitty websites with no access control.

AFAIK the Office alternative failed completely and they're back to where they were, maybe even deeper into 365 actually.