For scrolls-as-non-charged-items, I've had good results for things where you need to actively read from the text. A Necronomicon-type book that lets you Control Undead by reading aloud its incantation, a book of warding magic as a concentration-at-will ward scroll, etc. For activated X/day stuff, I think there's an interesting niche for "self-rewriting" scrolls where you get X uses/time, with the option to consume the item for a bigger effect, represented as finishing fully reading the scroll. (Whereas if you only read the first half, you get the lesser effect and then it rewrites itself.)
For scrolls-as-non-charged-items, I've had good results for things where you need to actively read from the text. A Necronomicon-type book that lets you Control Undead by reading aloud its incantation, a book of warding magic as a concentration-at-will ward scroll, etc. For activated X/day stuff, I think there's an interesting niche for "self-rewriting" scrolls where you get X uses/time, with the option to consume the item for a bigger effect, represented as finishing fully reading the scroll. (Whereas if you only read the first half, you get the lesser effect and then it rewrites itself.)
yeah, there's a lot more room once you get into things that feel more appropriate for a book than for a single section of parchment