maybe one could die-cut sheets containing an array of cards that you first print onto and then are easily separated by hand and aligned with some sort of pegs. I once bought a type of printer paper to make business cards that comes pre scored/cut so you print it normally but then the cards come apart with a gentle pull.
The Casio fx-9750GIII though very poorly named is a gem full of functionality from python, to spreadsheet and even a text editor and very low priced for what it does. If HP made a similar product with RPN it would be a game changer.
I think at some point people get tired of so much turnover of technology that doesn’t correlate with much improvement in quality of life (i.e. the latest phones are probably marginally better than older ones) sometimes it even feels like one is forever forced to upgrade computers, operating systems, etc, with minimal improvements. For me that pointed me towards hobbies that are lower tech such as working with hand tools, or crafts that occasionally use tech (i.e. 3d printing) but the higher tech is not the main point to the projects.
I’m on the same boat, currently working on making my own multi tools. I reckon it can be a rabbit hole as I see all that’s involved in knife making and blacksmithing.