Most APIs I use, I end up using over and over and over again in different projects / applications. Only ever using 5 libs does sound incredibly boring. However

Most APIs I use, I end up using over and over and over again in different projects / applications. Only ever using 5 libs does sound incredibly boring. However the toolbox of libraries I've accumulated repeated experience with over the years is in the hundreds, and learning more about them has proven worthwhile. I assume most developers would say the same.