One thing that is surprising to me is that we haven't seen more open source software in crypto. It seems as if the two paths of open source software and crypto development are aligned in ways which could be mutually beneficial.
What kind of cryptocurrency software that is lacking in this ecosystem?
Many abstraction layers of cryptocurrency software are open source, it's meant to give developers some room to develop some altcoin applications. The development would thrive if the developer's resources are plentiful, and as far as I concern, many of them are not lacking of any open-source materials.
I think those two paths of alignment are rather codependent, and they might have already been applied, as of now. In order for cryptocurrency development to thrive, opening up the code base to fit the cryptocurrency transparency nature is a prerequisite.