I totally understand why. It just felt weird the first time I came across a beautiful Linux Mint app, that couldn't be ported to windows..

.. the cool thing is, that it is possible with WSL and it probably will be almost seamless in the future - without additional work for the devs.

I specifically want to use Planner because of the local mode. Afaik ther are no nice local-only todo apps for windows with sub-task support.