Can’t ever lose those critical acute care skills! Just like we kept those flash cards from Nursing Fundamentals 1.
I’d invest your time and energy into your soon new career path. You won’t need to know how to run a CRRT machine or push adenosine as an FNP. There is no need to continue to maintain a set of skills that hold little value in your day to day. Let them go, enjoy all the new responsibilities and duties that are about to be sitting at your feet.