Isn't that the same thing with Mega Evolution? When both concepts show up they are considered high level tactics but then as more and more people get them on their teams, their severity lessens because more people are on equal ground.
We only
just saw the first non-Mega get a clean win against a Mega, and there were specific reasons as to why that happened.
Earlier in the series, Megas could only be contested with Z-Moves.
Remember how it was a big deal when Brock's Mega Steelix could tank Inferno Overdrive, and it was coughing up steam from enduring the immense heat?
Then...
Pikachu blocks Let's Snuggle Forever with Electroweb
Midnight Lycanroc just outright tanks Splitered Stormshards
Umbreon tanks Subzero Slammer like it took no damage
Decidueye flies upward to avoid Bloom Doom
Charizard burts out of Savage Spin-Out before it finishes
Golisopod slices up Oceanic Operetta like an onion
Some of these I can understand the visual logic. Needing a huge boulder to fill a black hole follows cartoon physics, and it was consistent.
Bloom Doom, All-Out Pummeling, Let's Snuggle Forever and Savage Spin-Out can be exploited because of how the move is executed.
But tanking and blocking the moves is just unacceptable right now.