My laptop is from 2015. In new Thinkpad models will be easier to find compatible models with the Thinkvision monitor.

There does seem to be similar devices from other manufacturers, maybe one of them has better suited connectivity options?
This monitor seems to match the quality of normal monitors while alternatives seem to fall very short on this regard. Regarding connectivity of alternatives is something I will need to do some research on, but the image quality being poor is something that puts me off of considering them.

I’d imagine unless you were looking for touch or pen support then most of them should be fairly simple to plug and play.
No, not looking for touch or pen support. Just want a portable second monitor that offers the same image quality I have in the laptop monitor.