Unless you're actually adding additional fermentables, it's not really a secondary, it's a bright tank...
Personally, I'll rack to another vessel only AFTER the brew has finished and if I want to age for an extended period on another element. I have a wee heavy that's been on the yeast for over 5 weeks now (coming up on 6 this Sunday)... I plan to rack it into a 5.16 gallon Sanke keg with 1-2oz of medium toast oak cubes for 1-2 months before bottling it up. I could just drop the oak into the primary, but I want to clean that sucker and set it aside.
For brewing, I'd avoid racking unless you have a valid reason to do so. Such as the ones listed above. You also need to be careful when racking so that you don't introduce oxygen to the brew. So unless you're process is solid, I'd avoid doing it. Better for your first several brews to be single vessel fermentations before bottling/kegging them and get something wonderful, then risk contamination and oxidation due to racking when you don't need to...
This applies fully to brews using ale yeast. There are some styles that you want to rack, or benefit from racking. But, you can still use the long primary option there if you wish...
Personally, since I'm using ale yeast, and focusing more on styles from the British Isles, racking before a brew is 100% complete makes no sense. I've left brews on the yeast for up to 6 weeks so far, without any ill effects. If anything, when I've left them on the yeast for 3-4 weeks (or longer) they've become very clear and taste wonderful... If your brew has a yeast flavor to it, leave it on the yeast longer... I know it might sound counter intuitive, but leaving it on the yeast longer will help clear it up faster/better... At least in every brew I've done that with (as with so many others here too)...
Another advantage (as I see it) to long primaries... Less work, and great brews...