I feel like there has been considerable improvement in the hobbyist PCB scene... Prices, process size, and turnaround time for low layer count boards have come

I feel like there has been considerable improvement in the hobbyist PCB scene... Prices, process size, and turnaround time for low layer count boards have come way down. But still, like you say, >4 layer stuff gets crazy expensive fast. Maybe easy access to higher layer counts will be the next milestone.