I would say, as others have, it depends on what type of riding you want to do. I would also say that being a "Ricky Racer" or "Professional Trail Racer" type has little to do with it -- I'm neither one of those and I wouldn't consider riding without studs. Trails (at least in many parts of Michigan) often get quite icy. Last Saturday the wife and I were riding very hilly and icy terrain (at low to moderate speeds) in the UP and I don't know if we'd have made some of those hills without studs. If you plan on riding strictly off-trail, then no -- studs are not necessary.
I've had three sleds (four if you count the wife's) and 15,000 - 20,000 miles with studs, never had one pull or tear out, and bent only a small handful. I have 9,000 miles on my current sled and not had a single engine problem and it's never been opened. But, and maybe this is a big factor (or maybe not, I don't know) I'm not hard on it and I'm not concerned about getting every last bit of horsepower out of it that I can. If having the studs means a few less HP, so be it -- I'd rather have piece of mind. Yeah, they are not kind to the garage floor (my sleds are rarely in the garage anyhow since I have to trailer everywhere I go) or the trailer deck, but there are ways around that.
As for track life, well....I don't know if studs decrease it or not, but I've gotten 5+ years out of all my studded tracks. Some of them I've even restudded.
Not disputing or poo-pooing any other opinions, just stating my experience.