Yeah, they've electrified the system. Congrats, I guess? The system is still a glorified people mover. It goes in one direction, turns around, and goes in the other direction.
Given Caltrain's route map stagnation and the worse fates of other CA rail projects, it really doesn't seem, well, grounded to reality, to suggest everyone emulate California rail's success. After all, it takes two days to grab a train from Seattle to SF!
If you want a half-decent model, at least look at NYC. The LIRR, Metro North, PATH, and the subway form something resembling a coherent transit grid.