Flight 3 specified we could start progressing season 1, see tweet:
Either they worded it wrong and meant to say “season 0” or “season 1 that will be reset”
OR they meant to have progression from flight 3 count and just messed up
That just meant we were able to unlock and try out the items in Season 1, not that we would keep it to the full release.
Nothing transferred from flighting progress to release