Sorry Peter but I'm going to have to strongly disagree that the lack of it does not seem something that in itself should prevent the use of Lumion 2023 for me.
There are not nearly enough good texture options within lumion to not allow us to heavily modify the textures that we have and changing the color makes the textures pretty useless. Look at the three examples below. Left is a 2023 stone texture that I want to look grey. Center is 2023 stone texture with a color added to it to make it grey. The right image shows how by turning down the saturation in Version 11/12 creates the same stone look with vivid detail but with the coloring needed. The same goes for timber textures, just look at the overhead doors and trims between the images. I can get away from brown looking textures by turning down the saturation.
Now I ask, why should I switch from my perpetual license to limit my texture choices? RTX and lighting updates may be nice but I'll stick with my paid for version and be able to manipulate my materials so they still look great.