What the future brings don’t help me running out of memory constantly now
I only tried the free ones, and I do like the high res stuff - not so much for using as a repeatable texture, but for random lookup stuff on tiles etc. Image textures usually can provide better variation on details that what I can achieve with a reasonable amount of low detail generators (and it doesn’t take Eevee much to choke on them for now).
But you can do a lot more than color ramp generators/image into i.e. roughness. I.e. (Red * Green) ^ Blue / (Saturation - Hue) for something that may look completely different than any of the channels. No, you won’t get a more accurate roughness or height map this way compared to a dedicated generation. But often (don’t know about the polygon textures) I find it obvious that these maps are derivatives that could have been mimicked. Although it would take time to explore and setup - time you might not have. Heck, in some cases you can even find “different” textures of a certain type where they didn’t even bother changing the generator seed, which I find incredibly lazy.
The overlay stuff is magnificent, although I don’t use them as much as I should, even though they can be used for a lot more than what they are intended for. For some, it might be worth subbing just to grab these alone. As much as I like them and might want them, it’s not what I typically do when I do the occasional render at work, so I never bothered.