Has anyone on the list had any experience with keeping boxwood indoors?

It depends on which species, but they all need a cool rest. I leave Kingsville
box outdoors until the first frost warning, then grow it under lights for the
winter. It does fine.
Iris,
Central NY, Zone 5a, Sunset Zone 40
"If we see light at the end of the tunnel, It's the light of the oncoming
train."
Robert Lowell (1917-1977)