>>23372308
Just like all beings will eventually evolve into crab, all jets will eventually evolve into Raptor. Also, chances are those are different jets, like the Su-57 or the Lightning II. A lot of 5th gen fighters out there are kinda copying what the Raptor did because it is a fucking monster. Also, iirc, there's only so many shapes that can help a jet hide its radar cross section while still being aerodynamic.