Although it was released, i think i understood what he meant. Even though he was a bit "harsh" on his words lol.A17 Stable was released a couple days ago just FYI
A17 was released however it is still full of bugs ( most of them are know so fixes should come soon ).
However even though A17 got a couple of bugs, being released as stable only means that they are not going to make any core changes on A17 so they will mostly fix bugs. And that's a relief for mod makers because core changes usually (most of the time) break mods and you have to update it.