Bedrock Edition 1.17.0

I can't edit the unconfirmed features section for some reason, so can someone point out that Felix or Xilefian or whatever, hinted at the height limit being changed to be infinite? They say it here: https://mobile.twitter.com/Xilefian/status/1333455781660909577

1.17.0, the first release of the Caves & Cliffs update, is an upcoming major update to set to release in mid-2021. It was first announced during Minecraft Live 2020 on October 3, 2020.

No dates have been given for the release of development versions of this update so far, or the final release.