This is primarily a podcast, but there is a short article with it. Also worth noting, this podcast came out before the Steam Deck OLED was announced, although it’s possible the participants knew of its existence considering they had an early review unit.
Being against the 3ds wasnt a fault, it was initially an opportunity (the launch 3ds sold terribly, that nintendo had to apologize and give early adopters the early ambassador titles for free). Sony chose to willingly not capitalize on it.