The Army has expressed interest in the past for taking over the A-10 fleet should the Air Force try to retire it, but that was 2013.
https://archive.today/20130915210441/http://www.defensenews....
Meanwhile, the Marines are trying to figure out how to utilize the A-10 even more.
https://www.marinecorpstimes.com/news/your-marine-corps/2019...
If the Army doesn't pick up the A-10, then the Marines certainly would.
In my opinion, the only way the A-10 goes away is if the Air Force comes up with a direct replacement for the A-10's CAS, and the "Swiss Army Knife" F-35 isn't it.