As of April 2019, my main computer is a home-built Windows PC in an older Dell minitower case. Windows 10 Pro 64-bit edition and I jumped in early with the 1809 Update. This update has a recently introduced bug that can delete user files if the default folders (Think: Docs, Music, Pics, etc) have been changed but files remained or were added to the original c:\users\username\... folders. While I set up those default folders on a 2nd HDD, I did not lose any files, as I didn't leave any stuff in the original locations.
I upgraded the RAM with an additional 8 GB and am still on the lookout for a used Core i7 CPU to help content load faster. The i3 still runs decently.
Intel Core i3 CPU
16 GB of DDR3 RAM
Windows 10 & programs are installed
on a Samsung 850 Pro SSD
(2) 1 TB Western Digital HDDs
MSI 1 GB GDDR5 graphics card
500 W Antec PSU
APC 650 UPS
Samsung HD 22" monitor
Logitech K800 wireless, backlit keyboard
and M510 mouse
I back up my data to an external HDD and disconnect it after backing up.
For mobile computing, I rely on a rebuilt Lenovo Thinkpad. At some point, I'd like to ugrade to a Surface Pro.
My smartphone at present is the Google Pixel 2.
I have an original iPad & a Mini 2. Both still work fine but I can't add most any app or even update old apps.
I now have an older MacBook Pro, which the WiFi drops, but the Ethernet port works fine.