I recently completed a 21 feet long multi-use cabinet in a spacious loft in Dumbo, Brooklyn. The cabinet is installed against a wall that has variable depth, alternating between deeper and shallower spaces.
The lower cabinets have doors while the upper ones are open. All the wiring is concealed and easy to install. We left cut outs, grommets and chases connecting the cabinets together.
To the left side is the dinning area so the cabinet serves as a buffet. Towards the center is the TV and to the right there is the audio section including a turntable in a pull out tray.