I don't use stainless much at all,being a museum tool maker. I am usually doing repairs and missing parts on antique mechanical items,and some modern,but not stainless things. So,can't speak for carbon steel on stainless. No doubt stainless is a LOT tougher on blades. But,I use 1/2" carbon blades on W1 and 01 drill rod),A2,D2,mild steel,brass and aluminum. It works fine. I do have a bunch of bi metal blades I use on my Roll In Saw. They came with the saw when I bought it used. From the chips in the saw(which was in nearly new condition),it was only ever used to cut plastic before I got it. But new,those bi metals cost about $40.00 each.
I used a Roll In clone at the toolmaker's Shop. It was o.k.,but not as heavy as the real Roll In,so the saw was more inclined to "jump" a bit rolling into the metal if you cut too fast. The saw part rolls down an inclined ramp,which makes a natural "power feed" from gravity(which is VERY reliable!) The clone was a Wilton/Jet which cost less than a real Roll In.
When I was still at Williamsburg,I had to cut the "hot top" off of a bronze cannon they managed to cast. The cannon was cast bottom down. There was about 12" extra metal beyond the muzzle where the sand and crud could gather,leaving the main body cleaner. I can tell you that cutting through that metal was DEATH on bi metal blades. But,the director wanted the silly thing cut off anyway. I think I wasted about 5 expensive bi metals getting through about 6 or 7" of the dirty bronze. I retired before they tried boring the hole in the cannon. They bored the hole even in the old days. Made for a stronger casting. Must have taken forever
with only carbon tooling and wooden machinery.