Do they actually ever use it? I know it theoretically means that CBP can search anyone’s home in NYC without a warrant, but if they never actually do it, they might get shot down in the courts if they ever try.
Hardly. Both Trump and Biden will be gone (probably dead) after four more years and things will return to normal. All doors will eventually reopen.
Britain will never return to the normalcy of EU membership. Things have changed permanently for that country in a way that they might not have if they’d voted remain. Doors are now closed for them.
Biden's presidency is not the abnormal thing. It'll be yet another neo-liberal administration.
The abnormal thing is the genie of reactionary populism that the Republicans unleashed a decade ago, starting with the Tea Party, and culminating with the Trump party. Given that prominent republicans (Ted Cruz) are actively trying to marshal those forces behind them[1], I don't think that we'll be going back to normal anytime soon.
[1] He's far more likely to win the 2024 nomination than someone like Mitt Romney, who, for all his faults, is not happy with Trumpism.
Your comment was that "trump and biden will be gone, things will return to normal".
The parent is rightly pointing out that it doesn't matter if those specific individuals in power are gone, that doesn't mean the broader movements around them will change.
The problems of the world are rarely due to a single person, and rarely are solved by a single person losing power. Behind that single person is a system, and a new person will take their place if the system isn't also changed.