Well the thing with Vagrant is that it (in theory) runs your application code inside the VM, but you typically run all your development tooling in the host OS.
I suspect that it was on the local tooling side that things fell apart for this Windows developer, if he was grabbing a project mostly built on Mac or Linux.
A lot of popular dev tooling built around web technologies (node, Ruby, PHP, etc) isn't as mature on Windows as it is on MacOS or Linux.
My source on this is me. I have a Mac and a Windows box at home, and I've had projects fail to set up and build on the Windows machine for these reasons.
I suspect that it was on the local tooling side that things fell apart for this Windows developer, if he was grabbing a project mostly built on Mac or Linux.
A lot of popular dev tooling built around web technologies (node, Ruby, PHP, etc) isn't as mature on Windows as it is on MacOS or Linux.
My source on this is me. I have a Mac and a Windows box at home, and I've had projects fail to set up and build on the Windows machine for these reasons.