I suppose it's the easiest way to try it out.

I wouldn't use it long-term, because you don't want Godot to update without you knowing, if there's something that needs to be changed due to an update. I bet a few people noticed the update from 3.x to 4.x..

I've read it also doesn't come with the C# support, so that's one reason not to use Steam for it if you're interested in testing that side.