So that means by default high battery drain, heat issues, and having to manually switch on the discrete graphics card by hand every time you visit a 3D-utilising website.
People have been complaining about no auto-switch in Windows on Macbooks for years, yet they haven't fixed it. Tons of other laptops already support it (inc. Thinkpads).
Apple keep Windows "bad" on Macbooks on purpose. It is the only explanation for all the driver issues they have (but no other laptop manufacturer has).