Modular is ok as long as the boards are independent of each other.
In the AC/DC at Modern Pinball NYC one board is out and it takes out 3 others as they are daisy chained similar to JJP LED boards.
One major problem is that the particular AC/DC board has been back ordered from Stern for the last 2 months. In other words the game is really out due to one board.
Board mount LEDs are also a problem as one led out means having to replace an entire board.
Not the ideal solution for owners or operators this only helps the MFGs.
Sockets for LEDs on boards is really the best way to go as far as game lighting.
Not sure if Modern will be getting the new Spike based game soon but if and when we do lets see how the system holds up in there.