Re: Efficiency?? Ha ha ha ha….
@Roland6 and all
I understand what you are saying, and I worked for many years as a 'supported end user' (see icon) in a public sector organisation that used Microsoft everything. It worked generally very well, stuff got done. The platform supported the databases around which the organisation's activities were structured, and various 'business logic' applications from third parties with the usual borderline useable interfaces worked well enough for us to do our jobs. Shared drives housed various caches of documents and the usual Excel shadow IT applications disguised as spreadsheet files.
More recently, I work on a part-time casual basis (see icon again) for an employer that has migrated to Web everything. Currently it is MS 365/Sharepoint plus Moodle. People are working from home on their own devices (not all laptops/desktops) and getting stuff done. The 'business logic' applications are mostly subscription based services from externally accessed Web sites that do not depend on the core systems we use. The migration process involved changing email servers and losing older email. Noone seems to have missed it.
It strikes me that the 'cost' of moving over to Google Education or something else will now be *much lower* than it used to be. Younger colleagues are very comfortable hopping from one system to another and getting their head around a new interface. I have had no issues whatsoever accessing the various systems from a Webcamed laptop with Mint Linux (needed Zoom quickly, it was the easiest solution).
Perhaps the moat is drying out?
Best of luck all.