Never too complex for me, even when I may not necessarily understand it all. Simulations of any kind are my thing, and the more realism, the better. I was one of those relatively small number of folks who bought VBS3 PE when it was made available to non-military customers for a while. I would hate to see SB move away from that style of gaming but there are, of course, areas where it makes sense to simplify. Logistics is one area - given the time scale of the actions SB covers, at least the PE version, unlimited supply from vehicles is a reasonable adaptation. I don't need to manage that, but I do need to manage keeping them in one piece. As it is now, I think SB does a great job of striking a balance. Will I ever know all the vehicles inside-out? No. But if I know what I'm going to be using, say for TGIF, it's easy enough to study up during the week before.
SB is definitely a hobby for me. I like to play it, I like to work on maps, I like to work on scenarios. I expect to do a lot more of it once I retire.