In the most recent FAQ they did say that "virtually all add-ons that work in Microsoft Flight Simulator (2020) today will function in Microsoft Flight Simulator 2024". So all addons should hopefully still work. How that's gonna go with addons from third party stores, remains to be seen I guess. Would be a shame if they don't work, because that's where I got the majority of my addons.

But yeah, I'd be alot happier if the MSFS base game got lifted to this new version, and all the new content would be a paid DLC...