I like the sound of Steel strings on certain guitars a lot. Used to use them quite a bit on beaters. You won't find a lot of people to talk to it about, I've tried 3-4 times over the years and there isn't that much interest.
They do wear down frets though. As I'm sure everyone knows.
DR makes better steel strings than D'addario. DR's Steel strings for bass are incredible. D'addario is overall a more sensible company to buy from, because DRs Nickels can be wildly inconsistent, but DR has them beat in the Steel market.
DRs bass strings straight up destroy D'addarios. Rotosounds do awesome Stainless strings too. I love both those brands, but D'addarios are the only economical choice to buy here in the US, DRs and Rotos are close to twice as expensive, and D'addario has more flexible/sensible gauging in their sets.
I would highly recommend looking into both companies, especially DR for bass.
If you want to do Stainless on Guitar seriously, I would recommend into looking into flatwounds. Nickel flatwounds are too dull for guitar, but with the right pickup and guitar stainless flatwounds can sound awesome. DR also does awesome flats for guitar, but they aren't cheap.
Fender makes excellent strings as well actually. I like quite a lot of their sets. They have flats for bass that are very close to the Roto Steve Harris signature set for a fraction of the cost, and their stainless flats for guitar are good as well, slightly more affordable than DRs.