Does anyone here use Windows Subsystem for Linux (WSL)?
Not me. Currently I manage 8 (non-virtual) Linux servers, 1 FreeBSD server and 3 Windows servers (and at least 20 Windows workstations and a set of MacBook Pro machines). One of the Windows servers I use as daily driver and I use Putty and/or SmarTTY on Windows to manage the non-Windows machines. If I have a task for a Linux machine, I'll use a Linux machine to do it with.
WSL has no other real use than for a developer who wants to keep all his/her development on one single machine. Nothing wrong with that, but I like to use the PC's I have at my disposal to do stuff. Because one machine is doing one thing, another computer can be instructed to do other/different stuff. I like to think I am more effective that way.
Still, if WSL works for you, then great. To me it is a solution in search of a problem.
Virtual Desktops are also mentioned in the Quora question. VDs can be used effectively if you only have one screen at your disposal. But once I got a second monitor, I never looked back at VDs. Not even once. Swapping between VDs can and will break your concentration. And you will always encounter one tool missing in your currently open VD and if you need to swap between VDs because of that...meh, the second monitor made me much more productive. Again, that is something I like to think. Never actually measured this.