Is anyone doing open hardware FPGAs (I don't mean reverse engineering proprietary FPGAs, I mean implementing new silicon)? Recently a RISC-V company implemented a simple 32 bit CPU on the ancient TSMC 180nm process. NRE was apparently quite affordable and turnaround time was a few months. So perhaps a startup could work on implementing a 1990s-era PLD in the same process, just as a starting point to judge market demand.