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XY was their first move to 3D and their first worldwide release
SM was their anniversary game
SwSh was their big console debut
Celebrating the original games in any one of these is fine. It also doesn't rob the games of their own identity, because they all draw on different cultures for their main narratives and setpieces. Especially Alola, which is the only game to walk away from Pokemon's traditional Gym Battles. nuPokemon is arguably more creative than its predecessors since we're starting to see actual boss monsters, nontraditional game progression, removing archaic systems like random battles, etc.
