Tastes towards either phone are 100% subjective towards the needs/wants of the individual. It’s funny that these infighting threads do not have the 8 involved. Like politics or any subject that inspires opposing thoughts, nobody is going to change anybody’s minds, especially when that mind is made up.
I believe the X is an upgrade from the 6/6s/7 the same way the iPhone 5 was an upgrade from the iPhone 4, and the iPhone 6 was an upgrade to all of the predecessors. I also think the plus models were to cater towards a niche market which may had been larger than even Apple execs expected. Regardless, the Plus is still not for everyone.
I feel those upgrading from the 6/6s/7 will for the most part see and feel the true upgrade to the X due to similar form factor, and that screen, technology, battery life, etc easier to see where the upgrades really perform.
This “upgrade” is much much more subjective and harder for Plus users to see because we are so much more used to a larger usable area and aspect ratio. The processor and RAM are exactly the same, the battery life is great on both, the cameras are great on both, the biggest physical differences between the 2 are the sizes of the devices, and the Plus has a wider/shorter screen vs taller thinner screen including notch on the X. That makes it MUCH harder to get used to from Plus to X than standard 6/6s/7 to X. The only technical upgrades are Face ID and front camera which makes the technical upgrade much more minimal for Plus users. The cost to upgrade to the 8 Plus vs the X is not as large so I don’t think the battle is price so much as being used to one thing, and needing to get used to something different.
It’s funny, you heard very little complaints about the design of the MacBook Air/Pro lineups. Those laptops looked pretty much the same for a decade, but a 4th year design on the iPhone 8 and 8 Plus is old and antiquated for some, and tried and true for others.
I am personally all about choice. I am happy Apple gave us the choice for tried and true or brand new.
For me.....I watched the reviews, played with an X in the store for a LONG time, even purchased one to use it next to the 8 Plus. I wanted to love it. In the end, shorter and wider, tried and true beat out thinner and taller and brand new design. I didn’t feel the screen was so mind blowingly better on the X than the 8 Plus. And that’s ok. The X is not for everybody and the Plus size phones are not for everybody. From numerous threads and posts I do believe generally the X is so much more a no brainer for 6/6s/7 users than Plus users. But again, totally subjective, and none of us are wrong.