Their 40 yo boss will have never used anything other than a web browser (or a game) in their entire lives at that point. He will never have heard of AD. Windows is legacy at this point. Only the most old and obtuse businesses still use it and then only for Excel and maybe PowerPoint. Most of the staff today only uses a web browser. In 20 years, nobody will even know that AD existed except in some museum in SJ.
In the medium sized public sector organisation I do some work in (not tech), most of the business type systems we use are reached via Chrome and are subscription based. I can log into them all using Linux with Chrome installed from home and there is no difference compared to using an organisation PC in their premises. Yes, I am logging in via Microsoft 365 but very few of the applications apart from email and calendar/Teams are used. The business type systems could well be running on Azure but I suspect not, at least for some of them.
Contrast that with a decade ago. All systems accessed via networked PCs using Windows native clients. I had to use RDP to a desktop to access anything from outside the network.
One day someone is going to realise that the organisation does not have to spend £££ replacing every PC just to keep running a Web browser.
