Honest question: is there any reason for using RSA for new keys these days, if you are not working with extremely legacy systems? My ed25519 works fine with at least CentOS 7, and thankfully that's the oldest system I have to touch.
Maybe only if you want to store the key on a separate physical device, and it only supports RSA?
Maybe only if you want to store the key on a separate physical device, and it only supports RSA?