His comment made perfect sense and was just telling, what others have been saying already. 

I myself, for example, have a simple principle....I need 5 games I really want to play on the system before I buy it. Like LivingMetal was saying, this is totally independent, at least for most, from how good the system has been selling until then.

The more exclusive and varied games a system has, the higher the possibility to sway people in thinking about buying it. It's a simple to understand concept that probably middle school kids understand already. Not hard to understand at all.

Exclusives matter a lot when they're the main differentiating factor between you and your competition. If you and your competitors systems are about the same price, play games at about the same level, offer about the same features, have similar online play, have similar apps, and offer pretty much identical popular third party offerings then exclusives matter a lot.

But if any of those other things are missing, say lack of popular third party games with Nintendo's platforms, or MS's always-on XBO launch, and inclusion of a Kinect no one wanted for an extra $100, then those factors can make a bigger difference in choosing between one platform and another.

One or two exclusives, probably won't make much difference, but hundreds of exclusives over the consoles life? It does all add up.

Of course I do agree with you it is not the sole factor that has been attributed to the Playstation 4's dominating sales, but it has allowed it to maintain a degree of momentum not seen since the PS2 era.

And Props to Sony, they deserve the success.

You don't even need a large volume of exclusives either.
You just need one really great one.

Halo for instance put the Xbox on the map.

Most importantly, It gives options and not everyone likes a handful of IPs. Halo didn't really hold up to the sands of time and now xbox isn't on the map as much. It's why a variety of exclusives are good rather using one big IP as a crunch. 

The reason for me to keep purchasing the PS is their exclusives.

I'm guessing it's not Nintendo fans. That's the only argument We had throughout parts of our history.

So the market is small, Xbox doesn't market, but it sells the same? That was the point you brought before.

Second post in 2 days I see someone saying like stores likes to lose money so they decide to give less space to the best sellers.

Only Nintendo games are major selling points as exclusives.

As Evidenced by the success of N64, GC and WiiU

xbox fanboys mostly.