Is the new Ch. 2 Redux 1.21.0 release recommended for starting a new "permanent" world that can withstand future updates?

[cosmobeau]

Is the new release now stable enough to start a new world, or is it still unstable? I just saw this:

Can I start playing 1.21 now?
We are decently confident that your v1.20 or older worlds will not break. If you want to be on the safe side, wait until the stable release. (But we recommend now not continuing a world you created in any of the pre-releases of 1.21.)
We would highly recommend making a backup copy of your 1.20 worlds before upgrading the game to 1.21 - for example, although it has terrain smoothing, there is still a potential that the -rc.1 release will create chunk borders for some, due to changes in worldgen.

[LadyWYT]

2 hours ago, cosmobeau said:

Can I start playing 1.21 now?

Absolutely.

 

2 hours ago, cosmobeau said:

Is the new release now stable enough to start a new world, or is it still unstable?

1.21 has a stable release now, which should be fine for starting a new world without major issues. It should also be fine to update existing worlds to 1.21, but you might want to make a backup just in case. For updating a pre-existing world to 1.21, @Professor Dragon gave a great rundown on how to do so here: 

If you created a world in a pre-release or release candidate of 1.21, that world is most likely no longer viable, and you should start a new world on the stable 1.21 release. You could always try playing one of these worlds anyway, but keep in mind that it's likely there have been major changes/bug fixes since the unstable releases. Starting a new world on a stable release will ensure that everything has the best chance of generating and working properly.