That is the consensus of dedicated user-researchers:

https://discussions.apple.com/message/30943847?ac_cid=tw123456#30943847

There can be a lot of El Cap library prep to do first. Some of this may be old Aperture version data defects that El Cap tolerates but Sierra doesn’t (likely some Sierra bugs there too). 

So it should be possible to use Aperture through at least 2019. Maybe Photos.app will scale by then.