Do you have any example of an open source project written in the simple style suggested by Casey Muratory that is very difficult to be maintained and you think

Do you have any example of an open source project written in the simple style suggested by Casey Muratory that is very difficult to be maintained and you think would benefit from using "clean code", "SOLID", design patterns and abstraction on top of abstractions? If you can't point to an actual example, I don't think you have a solid case.