You can do a lot more one a full sus bike, been riding for 16 years most of them on a full sus, there a lot better than they used to be. My first one didn’t work when you stood up. But i must say you do have to spend quite a bit more on one, so why not just get a second hand giant trance frame of ebay.
Edit:
They improve you’re climbing because the rear wheel can track the ground a lot better thus giving you better grip.
Also thought id just show the Luddite’s what a real mountain bike looks like, cant see the point in hard tails my self 🙂