Surprised to not see schematic design entry for FPGAs mentioned in the comments. It's still considered heresy by professionals, but i think there can be some be

Surprised to not see schematic design entry for FPGAs mentioned in the comments. It's still considered heresy by professionals, but i think there can be some benefits to doing the top level design schematically so you can see at a glance how the major components connect to each other and the external interfaces. Things do become quickly unmanageable if you try to define all the logic that way, but if you limit it to just wiring black boxes together i would argue it can improve readability.