Most oop was designed in the context of desktop gui apps, which are much more complex that web apps imo. Is-a vs has-a is a lot more clear in context of widget

Most oop was designed in the context of desktop gui apps, which are much more complex that web apps imo. Is-a vs has-a is a lot more clear in context of widgets and windows. It still isn't perfect, most popular gii used inheritance whereas composition would probably be better. Inheritance ended up as a core component of oop principles when ultimately it is a flawed approach compared to more flexible composition methods. Liskov substitution was a massive success, classes were an improvement over structs, private vs public was generally a good idea even if the astro architects went nuts with it.