All of the imports seem to have minor variations based on the vendors wishes. Take the common 7x12 lathe, you will find that while clearly related they are not identical. Motors range from 1/3hp to 3/4hp, there are differences in how the tail stock locks, plastic vs metal hand wheels etc.
You also have to consider the forums focus.
This forum as a kind of generalist hobby / small working shop forum skews to larger lathes. I'd guess 12x36 is the most common size for members here with those who primarily use lathes under 10" swing being a fairly small minority. As a result there are a lot of members who just have no use for a small lathe, and see the benefits (size, cost) in no way offsetting the limitations. If you have the room for a 700-1000lb lathe it can be hard to understand the needs of somebody who just has part of a desk to work with and just needs to make parts the size of a thimble.
On a modelling forum I belong to, those that own lathes heavily skew heavily towards Sherline, with easily 70-80% owning one, followed by Taig, Unimat and only a small fraction with a 7x import lathe. The kind of work being done there makes a 6" or 7" lathe a big lathe.
I think the biggest failure of the mini-lathes is kind of personal. Because they are cheap, a lot of new people with little experience buy them. Often they find that they should have bought something bigger for their needs, but bought for the price. The issue of poor quality control and sort of being unfinished kits also makes them a poor choice for a novice. These combine to make a lot of people with bad experiences.
I have found that people who intentionally bought a small lathe with full awareness of their shortcomings tend to like them.