As someone said before, MS Outlook has NO comparison, specially if you have an exchange server or exchange online, and no, IMAP is not a viable option, it's trash.
Literally everyone in my circle of acquaintances switched from Hotmail to Gmail, ProtonMail, Tutanota, AOL, GMX, iCloud, Yahoo Mail, etc. years ago.
If I may be very honest, Outlook is very cheap both in looks and features when you compare it to Thunderbird, Postbox, Spark, etc. in 2023.
LibreOffice is slower and clumsier than full MS Office, for example saving a relatively simple native calc sheet takes around 5~10s on a relatively top of the line computer.
I quite believe that there are situations where MS Office achieves faster performance, but the situations where LibreOffice achieves higher performance are more numerous. Also Gnumeric is much faster than MS Office in handling the popular CSV standard. And you can actually also use SQL instead of MS Excel, which is many times faster and produces much smaller files that are much easier to send via email.
Gnumeric can also do something that MS Excel is less good at, namely displaying exact results. It has happened many times in the past that Excel has been used to make important economic calculations, and then it turned out that the result was wrong. So Excel is actually not even suitable for what it is used for.
And let's not even mention the 10-ton Adobe elephant in the room, that alone precludes me from using it at home.
RawTherapee is actually more advanced than Lightroom. And digiKam is more advanced and faster to manage photos than Lightroom.
I have also yet to see Photoshop results that cannot be achieved with GIMP or Krita, and the latter apps are easier to learn. So I am of the opinion that Adobe is not the least of the problems.
Game compatibility is not 100% and not guaranteed, in windows it is guaranteed
The open source AMD driver is currently the best GPU driver in existence. By which I mean that windows has no answer with the proprietary Nvidia/AMD driver that is equally stable and fast.
Game compatibility is not 100% and not guaranteed, in windows it is guaranteed, and if i have to dual boot to play some game in linux and other in windows i might as well stay in windows and enjoy full correct functionality.
There are games that are unplayable on windows due to bugs, and they run perfectly on Linux. You saw this in the past as well but now you see this more and more.
There are also more and more people starting to admit that they can install their favorite game easier on Linux than on windows.
Trying to use RDP was a chore with every RDP app not really working correctly like native mstsc
I also encountered bugs with drag and drop with mail clients where you could NOT drag from a network folder and had to instead click the "attach" icon.
TigerVNC and NoMachine always works perfectly in my experience. Have you already tested this?
The lack of fast/simple network tools like IP/port scanners with simple GUI (if it does not have a GUI i don't care)
I once had windows users install magic-wormhole on windows. On Linux, the installation usually takes +- 22 seconds. But among windows users at the time, no one was able to install it in less than 80 minutes. Although this is one of the simplest Python networking apps in existence. It is also a popular app because it has 17 000 stars on github, which is more than e.g. VLC player that just about everyone knows.
What I actually discovered then is that windows users haven't actually learned anything all these years other than to click a mouse in the least well-functioning operating system in existence.
It gave me the same feeling as an adult walking around in a kindergarten.
In 15 years of the shop i've worked, i can count on one hand the number of clients that came with a computer that had linux, and customers that asked to install linux were less than 3.
Almost all the Linux users can fix their PC on their own. Either they know a Linux person who can fix the PC.
And then you also have the fact that windows and macOs have problems more than Linux and BSD.
Take the entirely unusable MacBook Pro of my sister recently. She's been allowed to pay over 1000 EUR to repair this expensive laptop.
My cheap FreeBSD + bspwm desktop hasn't crashed in over five years.
Considering how intensive and advanced that I use the system, this would be unique if this were accomplished with a windows or macOs system.
I understand from your PC repair position that you prefer windows. Windows systems need frequent recovery, so you can keep practicing your job.