Depends on what you want to build. You can build a simple screw driver without any attachments, to keep it simple and have very specific usecase. You can also build a swiss army knife with 20 tools packed in it. Both have their own market.

A better example: What is a smart phone? It does hundred things for which there were special tools for each those usecases. But the phone killed all those super-simple, opinionated, single-purpose tools.