I had a funny experience with my 2012 Altima CVT, where I decided to change the fluid @ 60K miles.
Made a small research over Internet, mostly YouTube, from which I concluded CVT has no drain plug and decided to drain it through the filler tube.
Spoiler: I did not even check if I do indeed have a drain plug or not.
Anyway, HarborFreight has a brake bleeding vacuum pump, which I connected together with 2-quart rigid plastic can from applesause and some tubing.
It took me only 15-20 minutes to suck 5.5 quarts of fluid until I’ve got it almost dry.
Total capacity for CVT is 7 quarts, so it was not a bad result, I replenished with synthetic Valvoline CVT fluid and was very proud of myself… until on next oil change found I do have a drain plug
My “new” daughters car is 2007 Altima, replacing CVT fluid there was way much faster, yielded tad bit under 6 quarts.
So, based on this project, I would not go “drop pan” route ever again, at least if I can get well over the half of transmission capacity through the filling tube.