The GOP isn't a political party anymore. It's a cult. The GOP as an actual political party has, maybe, three members who are currently in office. Everyone else is a cult member. They will not abandon trump no matter what. I can't imagine given this the GOP getting rid of MAGA, but if they did just about everyone in their leadership is a billion times more committed to MAGA than to the GOP.
The best thing that could happen to the country would be if trump died tomorrow. I'm not sure how the cult continues without its leader. But the idea, at least for as long as trump is alive, of the GQP jettisoning MAGA and trump is complete wishcasting and recency bias based on how the GOP (at least publicly pretended to) acted during the rest of our lifetimes until their base's brain became broken by a Black man as President. Acting like polls, or stench of loss, or basic decency matters anymore to the people who make decisions in the GQP, is to completely ignore the last few years. None of it matters. They only care about holding on to power, which they'll do by controlling a radicalized cult and suppressing the votes of the rest of us.