yes they are better tools for burning calories and testing the breathability of jackets and stuff.
LOL. Yes, for the most part. THere have been a few scattered times, however, where I've wanted to go short distances through thick forests or up steeper terrain and haven't wanted to wear my touring boots. Approachs for ice climbs are a good example. If the snow is too deep to posthole, sometimes showshoes have worked better for me.