As a concrete example, when Blender finally made left click the default selection button (in harmony with virtually every other 3D software out there) it made the learning burden much, much easier for new users to shoulder. This, combined with many other UX improvements have made Blender possibly the most popular 3D software out there today, instead of the weird choice.

> Homogenizing expected behavior is a pretty good idea, it allows open source software to compete at a commodity level instead of a principle or fundamentals level

That applies if your only goal is to create FOSS software that competes head-on with proprietary applications, so that being FOSS is the only differentiator.

But obviously, this isn't always applicable as a general principle. If you want to enable new functionality and support new use cases, where there are a variety of approaches or trade-offs, and conventions aren't well-established yet, you probably shouldn't presumptively conform to an a priori monoculture.

> Less than pleasant because there's a pretty significant amount of overlap, but none of it is able to be homogeneous as there is some hard coding that a keymap alone doesn't allow for convergence.

This is a great counter-example, where adhering to well-established conventions for problems that are already solved is advisable. There's been a lot of divergence in UI design recently, with lots of applications moving away from decades-old standards for purely aesthetic reasons, and creating huge usability regressions in the process.