> The current version of Flatpak will continue to see a ton of improvements, but at the same time, the limits of what can be done with its decades-old design have become harder and harder to work around. As such, they’re also planning for and working on what they call Flatpak Next, or perhaps Flatpak 2.0, which is effectively a rewrite of Flatpak based on what they’ve learned over the years, making use of modern technologies

Nit: on "decades-old", Flatpack is from ~2016 only.