Republic, and later this year, SkyWest. IIRC, Republic has their own frames, but have started to receive some that were sourced from AA. IIRC, SkyWest is sourcing their own frames for the LAX ops.

I agree that an E175 -in general- is better than the narrowbodies in AAs fleet, and agree with emphasis that the Envoy crews, on average are better than mainline AA. Outliers in both directions, sure, but on average, give me an MQ crew.

Before COVID shut me down, I started taking multi-leg trips across the Southeast to get on regional metal and avoid the AA mainline cattle cars. Especially on DFW <>CLT.