In my experience, Linux in Virtualbox is a lot faster then WSL. I'm not talking barely noticeable here, I'm talking operations taking 0.2 seconds vs 10-15 seconds (on an SSD) in the worst case. It's literally faster for me to do shit in Linux and rsync it back to Windows than it is for me to deal with WSL at this point. The only overhead is memory and CPU, of which I have plenty. I don't have plenty of time.
>far easier to start
I just keep my Linux virtual machine open, so it's just an alt-tab away. At work, I run it the other way around (Windows as the virtual machine). It's basically the same story.
There was a benchmark on http://phoronix.com which proves my point.
My previous attempt a while ago to run Linux on a Win7 host via Virtualbox was unsatisfactory because the performance of Linux's GUI was very slow I tried to run PyCharm but it was painfully slow with noticeable lag.
The only things I can think of that might be special about my setup is that I generally: 1. Run the VM off of a different physical disk than the host OS (only necessary if you're using HDDs) 2. Allocate generous amounts of RAM (4-8gb) even though very little RAM is required. 3. Use machines that have 4+ cores.