I have a Microsoft Lumia 640 with W10 mobile. $30 at Best Buy at closeout in 2016 + 128 GB microSD card. I've been with Windows phones since 7.5.
I have a NuVision 8" tablet with W10 Home..mostly for reading ebooks and keeping up with email. A Surface Pro gen 1 with a Toshiba DynaDock and 3 external 21" monitors with Office 365. At my client offices I use my Lenovo ThinkPad Edge E570 with i7-7500, 32 GB RAM, 512 GB SSD, and 1 TB HDD and Office 365 and 2 external monitors. My last 'Windows' purchase was a Harman Kardon Invoke. Sound quality is awesome. What's really neat is when I'm cooking dinner and use the last of the lettuce, I'll say "Hey Cortana - remind me to get some lettuce the next time I'm at the Kroger." Sure enough, my phone reminds me to get lettuce when I pull into the Kroger parking lot the next day.
As a network administrator/IT contractor I set up and run Server 2008, 2012, and 2016. I run an Exchange Server clone at one government client. All my clients run Office 2010 and up. I run a government website where, among other things, I post upcoming government and nonprofit events. The Plone CMS-based website creates a vCal/iCal link. Clicking on the iCal link pops the upcoming event(s) into Outlook Calendar on all my devices with 2 clicks of the mouse. Another instance where being all-in with Microsoft was a plus was when we took down a Server 2012 R2 Hyper-V host for maintenance. I exported the website image running in Hyper-V to my laptop and imported into Windows 10 Hyper-V. The website was only down for a few minutes.
I had an 80 GB Zune back in the day. Xbox Music Pass. I had 40 GB free OneDrive storage prior to getting Office 365. Being all-in Microsoft just works well for me. My Lumia 640 does everything I need. 3 different email accounts in Outlook. Built-in Word, Excel, PowerPoint. Texting. The occasional phone call. Live tiles just like on my 3 PCs (4 if you include the 10 year old MSI laptop with W10 Pro I retired when I got the Lenovo). I realize that other than the Live tiles, I can get all this with Android/iPhone. I refuse to pay the premium required for an iPhone. I'm not sure I trust Android in regards to security and updates.
Should Andromeda ever make it to public release I'll probably get an early model. FYI my first Microsoft purchase was the Z-80 SoftCard that I plugged into my first computer, an Apple II+ back in 1980.