What Blender achieved is that lots of university programmes have started teaching Blender or becoming 'tool agnostic'. Studios have also started diversifying their pipelines (this coincidences with studios adopting Unreal and increasing usage of Houdini).

So while Maya is currently the standard, I don't believe that it's growing. It'll probably be around still in 20 years, with lots of studios having built their pipelines and tooling around it, with lots of people being trained in it, and because it's at the moment still better than Blender in some aspects like rigging and animation (afaik).