what is that complexity threshold? Self determined no doubt. Guy A believes his custom design is simple enough to comprehend by anyone. Guy B doesn't agree.

what is that complexity threshold? Self determined no doubt. Guy A believes his custom design is simple enough to comprehend by anyone. Guy B doesn't agree. It doesn't really matter at the end of the day. If you work in a team environment, the toolset will be pre-determined already. You don't have a choice.