"Also Most Daz store content is bloated with 4K even 8K textures that are wasted on anyone not using a 4-8k display that can actually view a 4K image at full resolution,"

No offence, but that's not how this works.

The size of a texture map has nothing to do with the size or resolution of your monitor.

Try thinking of it this way. A simple 1 metre by 1 metre cube with an 8k texture map. Unwrapping the UV's of the cube will reduce each side to around 1200x1200 pixels per side accounting for wasted space within the UV mapping. A customer takes the cube and places it in the centre of the scene then places a small statue on the top of the cube, lets say a 10 cm statue then zooms the camera to focus onto that statue. Basically viewing about 20 cms of the cubes top surface within their shot, which now only provides 240 pixels on the cube surface across the whole shot from an 8k texture. Now lets reduce that original texture to a 2k texture with the same shot, now we have just 60 pixels across the cube surface within shot. Of course this is just a basic example but it does demonstrate the concept pretty well. Some people especially in gaming aim for a certain amount of texture resolution per unit of feet or metres within a scene, for example 2048x2048 per metre. In animation and still image rendering, scale and proximity to the camera are also very important factors to consider as the scene is a lot more controllable then that of a gaming environment and it's possible to optimise textures according to their priority within your shot.

So is 8k too large? Well it depends, 100 peas on a plate with individual 8k textures per pea? Of course that's just crazy. 8k for the side of a cliff face being climbed by an adventurer? Hopefully 8k will be enough not to lose res in closeups...

A lot of the reason products ship with 8k textures is that is a fairly simple process to optimise a texture to a lower resolution, but impossible to upscale with any real accuracy. So for some a small rock with 8k textures may seem bloated when it's wanted to be just a small part of the background of a scene, but may lack required detail for someone wanting to render the same prop in detail such as with a line of ants marching across it. It would be considered a poor standard to simply make everything the quality of a background prop with no real details, as many customers do really want that level of detail in their props.