I sometimes play in a contra dance band that I call the Key Humpers, we play medleys of 3 songs for most dances, each one, often in different keys. I got tired of constantly tuning, capos, switching banjos etc. Now I play just about all songs in G tuning regardless of the key. It gives me more control over the sustain, vibrato as well as not distracting the group. I don't mean to imply that I never re-tune. Never is a long time. ( I do have a highly melodic approach)
blue grassers do this all the time do they not ?