I have an MRC Pure Power Dual, and my DCS stuff works just fine with it...as does TMCC. I also have an older ZW-C that I added 180w bricks to. It also functions great.
I see someone mentioned their very old MRC HO power pack.. I, too, have a 45 year old MRC HO Throttle pack. I use it now to power some lights and thing on my layout. It works.