Yeah, of course it doesn't line up completely but I simply have a ~15cm gap at the wall next to the window. Some people get a matching top plate and some boards

Yeah, of course it doesn't line up completely but I simply have a ~15cm gap at the wall next to the window. Some people get a matching top plate and some boards to make it fit snugly but I've seen just as many kitchens that don't run wall to wall. I mean, we stash a small ladder and a folding chair there, it's not terrible.