Rockshox are less prone to wear issues IME.
You don’t need to replace the oil when you drop the lowers, just turn the bike upside down and leave it for a few minutes. Take the lowers off, clean the stanchions and the seals with IPA and a lint-free rag, take the foam rings out, pop them in some float fluid, give them a squish, pop them back in the lowers, pop some float fluid on the seals (or some click grease), pop the lowers back on and you’re done.
If you lose any oil from the lowers make sure to put the same amount back in, of the correct weight.
It’s a very quick job, and the third or forth time you do it you’ll not make any mess 🙂
Probably worth buying some crush washers too, if they are deformed or damaged when you take the foot nuts off.
Simples 🙂
If you get stuck, have a look at the lowers service how to and just have the bike upside down when you do it, and skip removing and refilling the oil.