I have the small EWT carbide tools. I almost exclusively use the r2 for pens. For bottle stoppers, I mostly the round tool, but not exclusively. I also have a couple of large tools with 15mm r2 blades for hollowing out bowls & such.
But I also use spindle gouges, bowl gouges, skews & other tools for lots of things. Carbide tools are great, but they are only part of the arsenal. You can get by with them if you only make pens, but they aren't the answer to everything.