Disagree. They’re stored _somewhwre_ anyway, and they may as well be versioned.

Putting toolchains in perforce is how it works for lots of C++ shops, the setup instructions are “sync and hit build”, whether there’s a toolchain upgrade required or not

You could consider ZFS a VCS, and it can easily store multiple versions (snapshots) of Visual Studio.

It's not impossible, there just isn't that much demand for it.