In fact, if you give me, oh say, 3-4 days i could sketch out and show you as an example of everything i'm arguing for a line of technologies from Military Science, Steel, Steam Power, Thermodynamics and Medicine all the way to Electronics, Aerodynamics, Naval Aviation, Radar, Mass media, and Modern Seismology while still hitting all the important points that prepare it for the future (something by another name to emulate refining and electricity as well as other stuff but with different stats). The way i hope to design it, a steampunk civ could reintegrate with the modern age at electronics, or use their late age equivalents of fission and rocketry to make a smooth transition into the retro future age (with some buffer techs that I'll also outline if i have time)