Not sure about big enterprises, but I already see this happening in the mid-size, non tech company market.
I'm an IT manager and has been a sysadmin/ops for my entire career, and the past ~4 years I've been seeing a pretty consistent shift toward companies my company does business with deploying more and more macs. Windows is still dominant in my industry, but the cracks in the wall are widening. It's gotten to the point that I'm genuinely surprised now when I see Windows when someone screen shares.
Apple silicon is just too good and the generations coming into the workforce now don't have a "default" windows familiarity that we used to have. They're coming in needing to be trained on how to use a PC in general, windows or not, having used nothing but chromebooks and mobile OSes.
Now, Office OTOH is more entrenched than windows. Even the macshops I interact with are all on M365. Macs are managed with Intune, users & SSO with Entra, Defender for EDR, and of course the office apps. And that's why Microsoft probably isn't as afraid as it seems when it comes to Windows. Even without Windows lock-in, there is very real M365 lockin that is far more entrenched than the endpoint OS.
i disagree. unless intuit is also rewriting quickbooks, dassault systèmes is rewriting solidworks, every bank is rewriting their custom windows-only software, every government branch is rewriting their custom windows-only software, etc. and every company is willing to retrain 95% of their employees on a new operating system, have increased support requirements for a few years at least, etc.
not even touching the capital required for such a transition that in many cases has questionable benefits (from a business perspective).
time will tell! i have first-hand experience with how fast banks move, so i will stick by my 20 year minimum. happy to see otherwise, though.
in any case. what i replied to was a claim that windows is in "significant danger" today. it is not.
They already have. You can't buy QuickBooks for desktop anymore unless you want Enterprise, the expensive $4k+/year subscription. They dumped the Pro/Pro Plus and moved all those users to QuickBooks online.
And now they've launched Intuit Enterprise Suite in an effort to move the QBE customers into Online. The writing is on the wall there, desktop is going away.
It's also happening in more specialized areas too. I work in waste management/recycling, and this industry was traditionally windows heavy with thick clients on desktops. Even the truck scale software is moving to web interfaces, as are the dispatching and asset management.
OS increasingly doesn't matter for most knowledge work.
Yeah, there are going to be industries that will probably never move, certainly not within a 20 year timeline, but there are a ton that are moving or have moved entirely to SaaS and web apps.
Up front they won't need to do a full rewrite. They'll only need to make it work well enough under Wine.
At a source level, tools like Avalonia's xpf make porting WPF apps to other platforms easier:
Product teams deciding it's easier to ship on + customers having enough linux familiarity (from their other projects).
And the current crop of Microsoft people on the Windows team don't seem to understand building a platform in the way 90/00s Windows teams did.
It's clear MS moved a lot of their smartest people over to work on Azure products.
The market you're describing is real, and very significant—but I don't think it's even a majority of Windows users. If so, it's a small one.
And imagine what even 30-40% of all Windows sales disappearing over the course of 2-3 years would do to Microsoft. To Windows as a platform.
Then imagine what would happen if it was 50-70%.
The former, I would describe as "a disaster".
The latter, I would describe as "apocalyptic". (Y'know. For Microsoft as a company. Not in general.)