I just refuse. You can have pdf if you (quite reasonably) don’t want keynote.
Keynote is just a better authoring environment than PowerPoint. And my choice of tool needs to be optimized for me, the author and not someone else’s desires.
i mean the conversion worked reasonably well, it just still takes a lot of fiddling to get things looking just right, since there's always something that goes wrong with font sizes or alignment and such