I think this is also about choosing your battles wisely. When you build something new you will find it is hard. You will have a lot of flexibility choosing how

I think this is also about choosing your battles wisely. When you build something new you will find it is hard. You will have a lot of flexibility choosing how to go about it. It's not necessary to reinvent the wheel on every front. That's why I love frameworks (Bootstrap, Ruby on Rails, templates, even spreadsheets for business plans etc.). Frameworks quickly allow you to go from 0-80% without having to start from scratch. You just take something that already exists and then fill in the gaps with your values, colors, content etc. I agree with gitaarik that in the grand scheme of things libraries are also like a framework.