You know, I've got no problem if a guy just prefers HSS, and many old timers do for familiarity's sake if nothing else. But this line above is flat out wrong, and bad advice.
Someone new starting out isn't likely going to be using the old school carbide junk that you're probably used to. I'm guessing mostly brazed carbide and old school negative rake insert tools that require heavy cuts and higher speeds to work well - but we don't have to work with that stuff any more.
They're more likely to buy one of the many lathe tool kits on Amazon or Ebay that have a bunch of different carbide insert tools, and they'll discover that if they use decent carbide, it'll do everything the old timers say you need HSS for, but it'll do it better and easier without the frustration of wearing out cutting edges in the middle of a job.
And this is more true for threading than any other lathe operation. Do you spend much time threading hardened steel of any type? Or stainless or titanium? Maybe an aftermarket pistol barrel, for example? That sort of thing was why I quit using HSS way back when I first got into carbide. I got tired of stopping to re-sharpen a HSS threading tool because the hardened stainless pistol barrels I was threading were wearing out the cutting edges too fast. And of course every sharpening meant picking up the threads again and adjusting to get back where I was to finish the cut. A complete waste of time.
Enter carbide insert tooling - I've been using this threading tool for about 10 years now, and am only on my second insert. It cuts as well as a HSS theading tool, with NO frustration, counter to your claim. In fact it's so much easier to work with because it just doesn't wear out. I even use it for all sorts of grooving and chamfering operations too - not what it was intended for, but it works great anyway.
The only thing a rookie lathe operator really needs to know about carbide is not to bump the tip of the tool, and not to spin it backwards, because it'll chip. Other than that, everything about it with modern inserts is just easier than HSS, and it's misleading to claim otherwise to someone coming here for advice.
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