[rimliu]

I came to conclusion that very few people actually understand what a good OO design is and ever fewer have skills to implement it. All this talk about SOLID patterns and what is more likely to result in overengineered monstrosity than in something elegant and easy to maintain.

[ChrisMarshallNY]

One way to understand OO, is to write OO code in a non-OO language (like C). When you need to basically write your own vtables, you really understand how things work.

I had to do that, in the early '90s, because I was writing an SDK that had to be implemented in C, but used object abstraction. It ended up being used for over 25 years.