For the most part I’m not sure it matters. What specific problems have you had as a result of fragmentation in clojure project build tools? I don’t much care what the name of the command is: if running it produces an artifact I can depend on and use in my app, then it did the job. Different types of build pipelines have different needs.
For me personally it’s not a problem, but build tooling is a frequent obstacle for newcomers to the language. Fragmentation is the opposite of what we want here.