Previous Gen missing in New gen.

Kakashi, Might Guy, Tsunade, Iruka Sensei, everyone is nowhere to be found in the manga, even in its sequel Two Blue Vortex. It’s as if they never existed. I wish they would show up from time to time, you know, just to give advice or something. It feels like the Boruto series is only about Boruto Uzumaki and his few friends, almost completely ignoring the previous generation. OG fans, how do you feel about this?