Is it possible that the chamaar castes of especially north and north west india were most likely higher caste in past?
Like I imagine it this way
At some point in time beef was not taboo and so these caste people would've had enjoyed a status of a vaishya in pre taboo era but as gradually beef became taboo so did these castes went down the social ladder
As they also have significant steppe component compared to other castes
This is just my speculation nothing else correct me in comments if I'm wrong