Have been using Koa for a while but I guess Express got its name too famous for any predecessor to take over as JS's web framework even if it means built by the

Have been using Koa for a while but I guess Express got its name too famous for any predecessor to take over as JS's web framework even if it means built by the same author. For one, people pick from number of github stars which is about 40k vs 20k and when you google for node web framework, Express is of course on the first page and Koa is not and for those who read blogs and books from only a few years back, they all talk about Express.