Current state of Hololens integration

Hi!

I would like to ask a few things about the current state of UE and Hololens intergration. This concerns the original Hololens, not Hololens 2 which will have better integration.

  1. Is there a default project that could be accessed anywhere? The links to the Github UE hololens samples are down?
  2. 4.23 has support for Hololens 2, however is this in any way “backwards compatible” with porting to the first Hololens?
  3. From scratch is is possible at all to make an app for Hololens using blueprints, if examples are not available?