Daniel Stone once pointed out a key difference between libweston and wlroots, two competing approaches for generalizing the work involved in building a Wayland

Daniel Stone once pointed out a key difference between libweston and wlroots, two competing approaches for generalizing the work involved in building a Wayland compositor, to explain why wlroots succeeds where libweston does not. He drew the key distinction between a framework and a toolkit. Weston is the former and wlroots is the latter. The difference is that a framework is in control and defers to your code from time to time, whereas with a toolkit, you are in control and defer to the toolkit when necessary. A toolkit-style library can still do most or all of the heavy lifting for you in a single library, but this approach is much more powerful and flexible than a framework approach while retaining most of the benefits. Many people view the framework/no-framework debate from the angle that the no-framework side describes a hodgepodge of libraries thrown together to create a crappy half-framework in the downstream code, but that is not necessarily the case. A "one big dependency" approach works with or without the framework design, and a toolkit design offers many advantages that the framework approach cannot.