I've only ever made ASICs for high power RF equipment and that was using large feature sizes (>180 nm) in the 90s. I don't think structured ASICs even existed a

I've only ever made ASICs for high power RF equipment and that was using large feature sizes (>180 nm) in the 90s. I don't think structured ASICs even existed at that point so I can't offer any insights. The idea is really cool. My go to advice: know your specs, know your vendor, know your delivery guy. If you can implement your design within the restrictions of your chosen structured ASIC, you trust the vendor to deliver on time/in quantity, and you can get them soon enough (I don't know the turn around time) then go for it.