What would change if recharge moves worked like in gen 1?
List of recharge moves: Category:Moves that require recharging - Bulbapedia, the community-driven Pokémon encyclopedia
This is what I think will happen:
Imo, Hisuian Zoroark and Porygon-Z would become very dangerous threats, although I think that Zoroark will be better for this since it gets stab on ghost moves and gets focus blast as well while being a lot faster than Porygon Z.
Giga Impact would be run by most physical attacking normal types you will be able to plow through teams, while Hyper Beam will be run by most special attacking normal types
I think the special attacking starters would use the starter recharge moves pretty often.
Prismatic Laser, Eternabeam and Roar of Time would 100% be used by their users.
Rhyperior would 100% run Rock Wrecker.