For me, it's about quality, when I can pull it off. Getting there, I, often, fall back on the "buying quality tools only hurts once, but cheap tools, poor quality tools hurt each time you use them."
To be fair, the Delta planer with standard blades does not fall in the cheap category. Nor does my Delta. I have the latter and it's served me for over a decade. That, of course, it one of the key issues - how long the equipment will hold up.
I don't do a lot of planing, or jointing [anymore], but it's nice to know the equipment I bought will hold up for, say, twenty or so years. I just picked up a pickup load of sycamore and madrona that, when dry, will need attention.
While my planer is not a Dewalt, it is/was the second highest rated lunchbox. My jointer is not a PM or Oliver. It's a Grizzly 8" long bed with spiral cutters. Grizzly's version of the Shelix. It did hurt once, but my regret at tossing out fourteen hundred on it [and a drive to Bellingham from Central Washington] passed quickly. It is quieter than my PM 6" was and it nibbles at figured wood like a champ (I, still, wouldn't run an end grain cutting board over it).
If I hit a nail, it will, more likely than not, not just be a matter of spinning a few of the four sided blades. It'll be a matter of replacing them. But that is still quicker, cheaper and easier than swapping three 12" or so blades. Too, if I don't hit a nail, there is the simple fact I get to turn the blades four times before I have to replace them.
In summary, if you're going to have a planer for a long time, why not have the best you can get.
SIDE NOTE: Square carbide blades sharpen easily, so any blades I, EVENTUALLY, pull off my jointer or planer would make great replacement blades for carbide lathe knives.