My current company is being absorbed into a much larger company right now, got bought out earlier this year.
I was the only IT for the smaller company, and I was using 100% Linux (Debian with KDE Plasma) on my laptop to administrate everything in our environment, which is mostly Windows.
- Our DC with AD on it, I used Remmina to RDP into it for admin tasks.
- O365 and Azure/Entra stuff was all in the browser.
- Our ERP system is cloud-based, so browser was fine for that too.
- Our access control system was cloud-based and the RFID card reader/writer was plug-n-play on Linux.
- Our company SMB share worked fine with Linux in Plasma using my AD credentials.
- I set up my company OneDrive sync using rclone, it also worked flawlessly.
- Our Fortigate firewall VPN has a native Linux app which, although ugly as sin, works without issue.
- I used OnlyOffice for a while, then switched back to LibreOffice. Both worked basically perfect, a few very minor font bugs, (bullet lists having a slightly different style for the bullets, etc.)
- Teams, I used a wrapper flatpak for a while, which worked fine, then switched to the browser version of Teams. No major issues, I had a bunch of meetings, screen shares, webcam, presentations all on Teams in Linux, pretty seamless.
- Email, Outlook in the browser is fine. I also used Thunderbird for a bit, but didn't like how buggy it was in the Flatpak version, and the Debian package was way too out of date for my taste.
Now that we got bought out, I am being forced off my Linux laptop and onto the new company's Windows laptop, which really sucks. I am planning on quitting soon, as I hate using Windows and I am very underpaid at my current job as it is. Only real perk was not having to report to any IT manager/CTO, and being able to use Linux.
KDE on my main gaming PC, or if I want something that looks really modern and sleek without tons of setup/tweaking on another PC.
Mint with Cinnamon if I want a #justworks setup that is rock stable and I don't need to look sexy.
My side business laptop uses LMDE with Cinnamon for that reason. I need that thing to be rock stable and dependable at all times.
Cinnamon has been more stable for me than any other DE, and in my experience, is just as performant as other low-spec favorites like XFCE. My fresh install of LMDE with Cinnamon right after boot uses about 850MB of memory. My testing with XFCE was about the same, maybe 50-75MB less, which for my use case is effectively identical.
Not crapping on XFCE though, I like playing with it on one of my old thinkpads. Not a fan at all of Gnome, I've tried to like it for years, but I just don't care for it, and I experience quite a few bugs.
I plan on trying the new Cosmic DE soon, it seems like Gnome done better, and I could see myself liking it from the reviews I've watched.