Note that, "older" means before April 2023. The language that existed then said you could continue to use the calendar year version that was available at the time, so presumably, you can use 2023 releases of their software as long as you were using it (started development? started training?) before April, assuming the courts rule that the old Software ToS applies.
I can't imagine anyone will start using them now, so there's a good chance that the new ToS will only apply to whatever new customers they signed on between April 2023 and Sept 2023, and people that voluntarily update to the 2024 release.
Still, it's a shame. They just threw out millions of developer hours (minimum), and it doesn't seem likely they'll be able to come back from their mistake.
I can't imagine anyone will start using them now, so there's a good chance that the new ToS will only apply to whatever new customers they signed on between April 2023 and Sept 2023, and people that voluntarily update to the 2024 release.
Still, it's a shame. They just threw out millions of developer hours (minimum), and it doesn't seem likely they'll be able to come back from their mistake.