As some of you have pointed out, the electronics are what makes me back away from the modern stuff. If it isn't repairable with a screwdriver or pliers, I'll pass. Plus, having a small layout means all the DCC, TMCC, whatever, etc. really has no use to me. The most modern engine that I own is the first Lionmaster T1 Duplex just because I fell in love with the real thing, and if / when the boards fry, they'll be replaced by a rectifier and a mechanical e-unit.
Postwar and Conventional for me thanks.