Because you can turn your console into a BD player just by using BD discs instead of cartridges. Unless the movie industry abandon BD and adopt some kind of cartridge which won't happen.

Do you mean SSDs?

I love SSDs, but yet I think compared to the 90's for example, due to most games being so damn big loading times today are significantly longer, aren't they?

Pictures of fish?! lol what an analogy!

SSD right now, but the next step will bring speeds like that of RAM-disc, which would mean faster than most standard busses could handle. As digital becomes the norm across all platforms and games keep increasing in size, as will storage solutions evolve. There's also the prospect of game streaming, or at least asset streaming, which would alleviate the need somewhat.

There are actually a multitude of reasons why we moved away from cartridges, believe it or not.

At least we got those glorious Zelda CD-i games out of Nintendo's stubborness, eh?

I'm interested in neither. Downloadable games are all I care about. I know that won't happen, I have heard most of the US still has dial-up Internet or no access at all. But if Nintendo could make a disk-free version of the console for cheaper, at least in Europe, I'd be all over that.

1. Expenses
2. Production
3. Corporate interest

cartridges in the traditional sense are WAY more expensive than disks, and by that I'm referring to the larger old school cartridges. The large amount of plastic and size of them was expensive to manufacture and make in large quantities (much slower process than disks).

HOWEVER at this point in time debatably large flashcards ARE possibly as cheap or cheaper than disks to manufacture. Flashcards are utilized massively in a lot of different fields and at this point have pretty damn large sizes for a fairly cheap cost to create

there honestly is NO reason that large GB flashcards are not being used instead of disks at the moment. Both are already being frequently used in large scale in different fields and both are manufactured cheaply

when people say "omg cartridges are dead" they're immediately thinking of the old school large ones and seem to forget that the tiny little flashcards that slip into phones or are used as data/memory USB are entirely viable and growing in GB size yet remaining extremely small

if physical media for games remains I could easily see the flashcard gaining prominence again. Less likely to break and it would allow INCREDIBLY small packaging (companies are looking to cut costs in any way possible with physical media, less plastic and less shelf space taken up is always a positive)

Discs. Blu-ray disc are extremely hard to get to not function.

There's no point in switching to cartridges or flashcards for home consoles. Pressing a disc is still cheaper. Games need to be installed anyway to make patching easier and keep the digital and physical version the exact same. Smaller packaging is not that desirable. Game boxes only got bigger and more extravagant until some standards were set. You don't get noticed with a tiny flash card, you still need something to put the box art on to catch attention.

Discs are easy to hold, hard to break. No contact slot to get dirty, pins to bend. Tiny flashcards would be a nightmare with kids. Blu-rays are easy, you can simply wash them in the sink if too many sticky fingers get on them. The things are pretty indestructible.

Plus what about movies and backwards compatibility. You need a disc drive anyway.
Physical music still uses CDs, DVDs still come out on DVDs. Digital downloads will simply take over before cartridges get considered.