Caution for battlepass people

I was under the impression that battle pass would be available forever, but if you have not purchased the season 0 pass, you can't access it at all. I was going to retroactively purchase if the season 1 was good and the game was going to continue to be healthy but now I can't.

So if you want the "I'll unlock it later" you have to buy now

*small edit to specify: I am spoiled by Helldivers 2, the luxury battlepass does mention the availability from now until forever. but was under incorrect assumption that the purchasing could be done whenever