[jsheard]

To be way too pedantic, if WSL2 (and therefore Hyper-V) is enabled then Windows actually boots into bare-metal Hyper-V first, which then launches the Windows kernel as a VM under itself, side-by-side with the WSL2 VMs if any are installed, so if the lowest level facilitator is what counts then you're really developing "on Hyper-V". I don't think that's a very useful distinction though.

[HeavyStorm]

Hyper-V is windows, just stripped down to be a supervisor OS, but same kernel bits. So, still Windows.

[petcat]

Well I'm extremely pedantic, so I'm going to say that UEFI is the real operating system!