since all these technologies (add others not mentioned) became cheaper over the years, wouldn't be wiser to wait a little more before any investment?
A simple answer: It depends.
It is not as simple saying that if they wait to buy a technology that the only difference would be price they are paying for the technology. You are forgetting about the trade off of not buying that new technology and waiting, one of them being that the user is missing out on using that tech while they wait.
There is an opportunity cost associated with either buying now or waiting for later. If you buy now, you lose more money, but you get the benefit of using the tech. If you buy later, you pay less now, but lose the benefit of the tech.
For example: I bought my near Max out Late 2012 iMac in 2012 for over $3K, and it is currently going for less than $1k on eBay today. If I would have waited to buy my iMac, what would I of used? I could have gotten something cheaper, but every day for the last 6 years, my performance would have suffered due to having an inferior product.
The question now would be, is that higher performance over the past 6 years worth the $2000 more (not counting TVM) than paying $1K now?
The answer depends on the user. Maybe having higher performance is worth it to the user to pay for a new Mac every generation, or maybe the saving the money is more importance and the user can go over a decade without upgrading.
Should we always have the last gadgets?
It is up to the individual, as mentioned above.
- In November 22, 2005 a local newspaper (from my country) showed an ad from a 42' PLASMA TV worth US$ 4500. Today the same TV is sold in an eBay-like website for... US$ 150-250. 94% less.
But, that is 13 years of not using the tech.
For me, the new plasma in 2005 was not worth spending over $4K, but for someone that needed or wanted to be an early adopter of that tech, $4k was probably worth it for them.
And since I am talking about prices, why it makes sense that Apple can charge
US$ 1549
For the new iPAD Pro (11/wi-fi only) with 1 TB...
Or US$ 799 for 64 GB, when we consider that decades ago we already had that ammount of storage for much less? Isn't this a complete rip-off?
Apple storage prices have always been goofy, and I am not defending Apple, but they can charge what they charge because people want their devices and want to use Apple's OS. There is an opportunity cost involved with this too. You can Pay more now, and be happy with the storage, or pay less and be unhappy about the benefit of storage.
And there is also the option of paying even less and buy non-Apple products, but you lose the benefit of using their stuff.
[doublepost=1544820434][/doublepost]BTW, the majority of people do wait to buy most of their tech, as the prices for an early adopter is usually way more than most people could afford. Use your digital camera example you posted.