In writing today we’re told Flashbacks are out. It’s a tired conveyance that many people overuse. I say balderdash and Poppycock!
We’ve had flashbacks in our literature since we were small children.
“Once Upon a Time…. ” remember that?
How about this one –
“A Long Time ago, in a Galaxy Far, Far, Away….”
Flashbacks are with us still, strong as ever. It’s how the writer handles them that determines their effectiveness.