There haven't been any major updates in the last year because the devs have been focusing on getting SR2 (which has been renamed to Juno: New Origins, by the way) to the full 1.0 release, which is happening later this month. Andrew has confirmed that once this happens, they "plan to spend more time with SimplePlanes this year", though nothing further has been announced as of yet.
Andrew also mentioned 'SP2' on a post, soo...
There haven't been any major updates in the last year because the devs have been focusing on getting SR2 (which has been renamed to Juno: New Origins, by the way) to the full 1.0 release, which is happening later this month. Andrew has confirmed that once this happens, they "plan to spend more time with SimplePlanes this year", though nothing further has been announced as of yet.