What technology? iPhone 4 back in the day was as relevant as iPhone X is now. Paying almost double is not justified in anyway.
That's not for you to make a definitive statement telling someone what is not justified based off what somebody else find value in over your own opinion. The User will make the justification in what they find value in, your opinion on the matter is not a one-size-fits-all for everybody else's preferences.
Most people need decent storage and good camera on their iPhones and those are priced very similar now as in 2010 so what technology are you talking about? OLED? Please, that is minimal. Force touch? Gimmick. FaceID? Please, touchID was much better.
Again, you're making more assertions based on your own disapproval on where the iPhone is today from where it was seven years ago. You're saying touch ID is better, others may disagree with you saying Face ID is better. It's All one subjective stance. But you can't force your narrative on someone else because you don't agree with the price point and what the iPhone offers today.
Also, you interjected OLED being minimal, I never mentioned the display at all. And then you go on to assert that 3D Touch is a "Gimmick". There Again, another assertion that you're saying something that you don't agree with what others might find useful. That doesn't mean that's not an advancement in technology, when in fact it is.
What about augmented reality? Is that something that's not considered an advancement and where it's going to eventually lead to beyond its infancy?
I would rather have iPhone 4 style technology and price in today's term than iPhone X with its technology & price..
And this is exactly what I have been saying along in this discussion, you want to remain in the times where the iPhone 4 was and you don't like or approve of where the iPhone is today. But that doesn't mean that technology has not advanced because you don't agree with the price point, "Gimmicks", or form factor. You're choosing an iPhone preferences based on your opinion, not on fact.