I personally like a pinpoint button, always used one, gets me a better precision pinpoint of the target. Which is especially useful in nice lawns where you don't want to dig pot holes trying to find the target.
Plus by the amount of times I press the pinpoint button I can size the target. If the target detunes with one press to a smaller target, worth digging for example. small coin size target. If its a larger target, it takes multiple times
to detune to a small target sound. If the sound stays the same, then its junk. The pinpoint helps if you know what its telling you. The above was learned over many years using non-motion machines back in the 70's-80's.
And works extremely well with Tesoros and concentric coils. I could generally push my metal probe down into the ground and touch the target. I find with the DD coiled machines pinpointing is not precision. I can get pretty close now. Trick with a motion machine with fast recovery retune is to hold the coil above the target, let the detector detune, wiggle the coil. That bit of motion will pick up a target again but weaker smaller signature. Stop again over the target, let it detune again. Essentially doing what the pinpoint button will do. I am still not 100% accurate or as fast pinpointing with a DD like I am with a concentric. If I was out woods or relic hunting accuracy in pinpointing is not paramount. A lot of nasty holes and big plugs in parks and schoolyards I see are from those who can't pinpoint, they need to dig these wide plugs and then pull out their battery operated pinpoint to probe the holes. By the time these guys find one target, I'll find and dig 3 or 4, providing I have a good machine that can pinpoint accurately. One of the nicest pleasures with Tesoros is the ability with a concentric coil to pinpoint with precision. I try to duplicate this with any brand detector I own, one way or another. Some are much better than others. I prefer not to hunt with others that dig big ugly holed plugs in parks and schoolyards. Learned my lesson not to take those type to places I frequently return to hunt. The grass looks horrible a week later. I don't want to be blamed for it or told I can no longer hunt there. Good thing they have battery operated pinpointers for guys with DD coils that can't pinpoint................
You may not need a pinpoint button to locate a target but, its a very handle control on a detector for those that like them. For me its like using a scalpel instead of a butcher knife.