I think they fit a different niche.
After years going to hackerspaces and makerspaces, and being desperate of not seeing them produce big projects, I realized that they were not tool libraries for most of them. They are actually social spaces. Big projects, they start there but they usually move to more adapted places. A lot of the people with the knowledge and know-how to use these tools, they have ways to get access to them. They don’t need that space. But as the stereotype says, as geeks we are not that good at recognizing our social needs and we crave talking about tools, about making, about exchanging knowledge.
It is not about the tools, it is about what you learn there.
At the makerspace, you meet makers. Once you have the knowledge you need, you go at the tool library and you get the tools to get your thing done. Chances are what you want to do doesn’t fit in a shared workspace. Maybe you do something on a car, maybe you do something on a house, maybe you do something on a tree, maybe you want to show something to your young kid or to your family who lives in a remote place.
I write that from a workshop for my two mobile robots that I have founded thanks to the local makerspace. These robots they started their lives at the makerspace but now I need more room. I still go there when I have something to 3D print something or if I need the skill of the mechanical engineer there. But actually, I go there more than I need, because I like having lunch with them, I like hearing them exchange ideas about new machines, about the local politics, about board games, or about their latest crush.
You need at least the workshop to repair and maintain tools next to the tool library.