I'm of the physician's philosophy: "Do no harm."
Any product with abrasives works by removing finish - and that includes most polishes, even Virtuoso, which does work nicely to restore a finish that's been lightly scratched. What you're doing on a microscopic level, of course, is creating tiny scratches that grow less visible as you rub. So if you don't have scratches to remove, it doesn't really make sense to create new ones by rubbing polish on your guitar and removing finish.
And of course, even waxes without abrasives turn yellow. That's just what waxes do, even Carnauba, which is a wax that's so hard that it has to be cut with petroleum distillates to be workable, the pure wax is actually pellets. Carnauba's great for cars, they need protection from the grit and dirt encountered on roads. Not needed for guitars. Why add a yellow color? Unless you want that.
I advocate a clean, damp microfiber cloth, immediately drying the guitar with a clean, dry one. To give the surface a shine, the PRS Cleaner doesn't have abrasives, and works well. It also doesn't yellow.
If you have a pick scratch or swirl marks, by all means, the Virtuoso polish is great and works well on nitro finishes as well as the V12, so it's safe. The PRS Polish is a more traditional polish that can't be used on nitro (this stuff is not the same as the PRS Cleaner).
I also don't believe in special fretboard oils, your hands have plenty of oil, and the unfinished rosewood is a very oily wood that will stay that way for generations. I do clean the fretboard from time to time with lemon oil - I use the PRS stuff - but remember that lemon oil is scented naphtha, the same stuff your dry cleaner uses. It does not add oil, in fact, it removes oil. So it should be wiped off immediately when the fretboard is clean. My hands are pretty dry, so I maybe use it once or twice a year.
Most of the stuff people advocate to make the fretboard glisten or be darker just adds goo to attract dirt, dust, and cells from your fingers. The worst offender is of course mineral oil, or any mineral oil based product. It softens the surface of the wood, which isn't desirable, and it attracts gunk like crazy.
There's no need to use anything like that, and IMHO most fretboard treatments are "feel good" products that do absolutely nothing useful for the guitar. Unless you leave a guitar baking in the sun after wetting the wood, a rosewood or ebony fretboard isn't going to dry out in your lifetime.
Hell, go to a museum and check out ebony and other unfinished wooden items that were in tombs in Egypt for 3500 years, and held up just fine!
This business of "the fingerboard looked dry" is complete stuff and nonsense. It's wood. It's not supposed to look like it's been slathered with mayonnaise, coconut oil, mineral oil, or whatever other Big Idea someone has to separate you from your money.
Remember - "I polish it often" = "I remove the finish often and add new swirl marks." "I treat the fingerboard with this great stuff" = "I load the fingerboard up with goop to attract dirt and grime."
Bleh. Do No Harm!