Hello again

When was the last time you were following the hobby closely?

I don't know about advancing so much, but from reading it seems to be an ever changing ideas and methods, new and old, focusing mostly with nutrient transport. Carbon dosing, deep sand beds, algae scrubbers, macro algae systems, reactors for any and everything. The ideas and methods and substance behind them are ever changing, or coming back into more widespread use after people had moved on to the next greatest "advancement"
Zeo systems, triton method, there are a number of named systems or methods out there that seem to be forever coming and going.

The electronic options, pumps, controllers, lights etc. is all improving faster than you can buy it. Controller integration, control-ability, wireless control and monitoring of any and everything is where most things are headed.