Hi guys I'm new here so a little late to this post.
But I kinda want to know the same thing as the O.P - or ask how possible hard edge modeling will be as well.
I found the 3DCoat application through looking at alternatives to Silo.
Now I see 3DCoat is basically not made for any polygon "box modeling" like the poster above stated is available in Silo.
As Silo development has run practically dry I would suspect a LOT of guys slowly migrating to other apps as there are still bugs in Silo that remains unfixed and pretty mission critical at times.
I suppose while , from what I've read so far, 3DCoat will not be aiming to be a "one-stop-shop" for all your modeling,textured and animation needs.
Maybe Pilgway needs to try bring another app to light for Box modeling .... still leaves animating
I hope this post is'nt taking in the wrong way. Just wondering that's all.