I was one generation behind you. We had actual flip/flops and even small ROMs, made from something called CTL (complementary transistor logic) which was similar

I was one generation behind you. We had actual flip/flops and even small ROMs, made from something called CTL (complementary transistor logic) which was similar to ECL in its voltage and power requirements. But did not require water cooling, just banks of large squirrel cage fans.