As far as I know JXD won't update 7800 anytime soon (unless thay hurry too much in these coming days). I can't explain more (sorry for that), but it's the info I have.
Well, that's disappointing news, but I appreciate the update. Thankfully the firmware works pretty well (no real crippling problems), but it would still be nice to see some continuing support.
Willgoo seems to be purely focused on promoting the 5800 rather than supporting their S7800 customers. Not surprising, but I'd hoped for more.