vgo is exactly in the spirit of Go: they took a popular mechanism and simplified it. vgo works 90% like other systems with one major simplification: it replace

vgo is exactly in the spirit of Go: they took a popular mechanism and simplified it. vgo works 90% like other systems with one major simplification: it replaces a complicated system of declaring version dependencies which requires SAT solvers to implement with a much simpler, predictable algorithm that they believe will work just as well in practice. As a bonus it also removes the need for lock files, which is what other systems require to fix the issue caused by SAT solver (chosen versions of dependencies are unpredictable and will change if dependencies have newer versions). As it is with engineering, the new method also has drawbacks, which is partly why the issue is so hotly debated. As it is with Go, they believe the advantages of simplicity out weight the drawbacks. We'll have to wait and see until it's implemented and used to really decide. So far Go's strong focus on simplicity served the language pretty well.