Just because they are too scared of Floodgate, they will only play decks with these monsters only: Photon Cerberus, Tactical Espionage Expert, Eagle Eye, Invasion of Flames, Creeping Doom Manta
More like,
Stardust isn't really useful in the current game
Non destroying effect isn't that rare, and we had something called chain blocking to even dodge stardust effect.
Maybe look for other monster?
You are right over there. Stardust is hard to summon without a compensating shield.
Aromage has a chance to summon a pierce 3900 which made it still playable.