I've covered the last two of your post already. So you seem to be obsessed with solipsism as a true expression of a self and you think that every person is unique and incapable of understanding another person. So how's your anxiety treating you?
You refuse to discuss or argue anyone else's definition of what an Utopia can be or trough what other frameworks it can be looked at because those things are not yours and as such you may not feel like you have full control over the topic like you do if you just reduce the topic of what an Utopia is to solipsistic worlds. Which by the way? I consider making yourself look smart.
To begin with, you're either seriously misunderstanding my arguments, or you seriously misunderstand solipsism.
Solipsism, ultimately, is the notion that the only thing which exists is the self. Under solipsism, only 'I' exist; all others are mere fakes.
How does this track with the notion that every individual is unique, and has their own ideals and preferences? It doesn't. A solipsist does not believe that different people exist at all, and because other people do not truly exist, they cannot have their own ideals.
Furthermore, I have not asserted that there cannot be people with shared ideals, or who understand each other. It is entirely possible for groups of people to share 'close enough' ideals to agree on most things, and because people change over time, a group of people with similar shared ideals can easily come to agree entirely on their ideals.
This is, however, not relevant to my broader point.
If half of the world comes to agree that becoming nothing more than a cog in a great machine- a position that has been advocated multiple times through this thread- is 'Utopic', the other half still disagrees. If the half that has decided that transforming humanity into the cogs of a divine machine goes through with creating their 'Utopia', then they have created a Eutopia for themselves, and a Dystopia for those who disagreed with them.
As far as 'other conceptions of utopia' are concerned- What other conceptions of utopia?
The democratic 'utopia' that all people should be able to put forwards their own ideals through a democratic process, and that through this process society should weigh the wants and needs of it's members and create a world that's good for all of them? That isn't much more than a slight adjustment to the current democratic system we live in today. It is nothing more than tinkering with the current system slightly, in hope that it will create a slightly better world.
Given I doubt most people would consider the current state of affairs 'Utopian', even disregarding my own definition of what a 'Utopia' is, I feel fairly comfortable saying that the average person would not consider this new system to be 'Utopia' in any meaningful sense. The dictionary definition of 'Utopia' is, after all, a world where everything is perfect; and a slight improvement to the old system does not make it 'perfect'. A world where everyone has plentiful access to food, drink, and shelter is a better world, but it is not a utopia.
If we take my definition, on the other hand, which takes into account the fact that 'perfection' is a subjective, individual measure, we can go even farther than saying that a slightly better democratic system is not utopian. Because democracy implies compromise between different and opposing factions within the population- Compromises of their ideals- we can conclude that democracy is an anti-utopian institution. That is not to say that democracy is bad, but the mechanics of democracy mean that anyone who engages in the democratic process is tacitly accepting that they must compromise their vision of utopia in order to get some small part of their vision enacted in reality.
This is not bad, but it means that attempting to treat this framework as genuinely 'utopian' is laughable for self-evident reasons.
As far as other conceptions of what 'Utopia' is that have come up in this thread are concerned, I haven't seen any others that really disagree with my position. At most, they are framing the same things that I am saying in a different way.