Most of the HO modelers I know, which is not many, have DCC so I would expect they would run a DCS HO engine on DCC rather than invest in a new DCS control system. HO layouts would not have a Legacy system on them either.
With the multiple Power Districts and multiple reverse loops in the track plan with 5 automatic reverse loop controllers we had to install about 20 capacitors across the two rails to get the Legacy signal reliably on both rails around the entire 650' of track. As far as we can determine DCS has not been added to a layout such as this. I am working with a professional layout builder who has extensive experience with both Legacy and DCS in 3 rail. Mine was the first complex 2 rail layout they built with Legacy plus the Lionel Control System, all their prior 2 rail layouts were DCC.
My point is there are known and tested best practices to make Legacy and DCS coexist in 3 rail, not in 2 rail at this time.
