About applications, that's covered in the "Project Status" part of the initial reply, that is, it's work-in-progress. All FOSS applications from Fremantle should run on Leste (perhaps with a few simple changes here and there or recompilation). Since there were not too many closed applications anyway, we can say nearly applications will be supported.

However, this is WIP for now, since some of those applications need libraries, etc. which are still being worked on, e.g. many needed Qt, which Leste has not packaged yet.

That said, even some Fremantle games are in the process of being ported, as you can see from the latest project status update, https://maemo-leste.github.io/maemo-...gust-2019.html