IDR plans for those of us with older student loans?

I recently read an article about how the administration is getting rid of (sorta) the IDR plans and, supposedly, "only allowing" folks to do a standard repayment plan or RAP after, I think, July 1 (or maybe just a "reminder", news-wise, about up-to-date, soon-to-take-effect measures put into law in 2025?)? I would assume, though, that anyone currently on an IDR plan that successfully recertifies (esp. for loans taken out prior to 2014, if memory serves?) can keep recertifying indefinitely, year-by-year, unless the administration (or court system), god forbid, totally gets rid of all, standard IDR plans?

I think I also read, earlier today (or, rather, was once-more reminded?), that IDR is grandfathered in, statutorily, so it can't really be gotten rid of easily- at least, for borrowers with older loans- so I guess we're safe in that regard unless some other, drastic measure is made that 100% gets rid of IDR plans for all borrowers?

'Just want to make sure I'm understanding things correctly (especially since, oftentimes, a lot of recent news articles talking about RAP and/or "getting rid of IDR" seem to frame things in a possibly-misleading way, which might confuse some folks?) Are the standard-repayment plan and/or RAP measures only obligatory for newer borrowers, or are we all, eventually, gonna be affected?