Steam runs absolutely fine on my m1. I haven’t checked if it’s running Rosetta or native arm code, but I can’t tell at all so it doesn’t matter. All my Mac games run fine on steam, unless they are old and 32 bit. But macs dropped 32 bit support a while ago even on intel chips. The games run great too.
If I recall correctly, the whole tax thing didn’t actually happen at that time as far as we know because there aren’t any contemporary records of it happening at that time.