Zeftax Well, i guess the next question would be do you want to contribute to the stable release or ReX what this topic was made about? Actually.. we have in the past refereed to ReX as experimental, but we are going to be pivoting that branding soon, We don't want the release to be thought of as unstable or experimental, as we will curate stable release tags for it.
That said ReX is where most of the feature development and progress will happen, at present 3 features are already in the works. But with that comes the philosophy that we aren't as worried about deviating from Godot over time, if we are to look to the future we must not focus on the past.
The main release (Simply called "Redot") will be much less likely to deviate from Godot and much less likely to break the core API over time, but with that will also be much less likely to add new/major features. With that, contributing to the main release "Redot" will be much more strict and much slower on what can be changed or added.
Ultimately its up to you i suppose, the two teams are led by different people with different styles and ideals.
And lastly, team communication is going to be another point, as we primary use Discord to communicate and coordinate, i'm not sure if you have equal dislike for discord, as you do GitHub, but since i haven't seen you there i assume so.