I have taken a (short) look at KOReader and saw that there's an instructions page on its wiki on how to install it on the rM2; it still uses rm2fb but it suggests using timower's version, which works on newer versions of the OS. What I should've made more clear in the post was that there are options, they're just less convenient to use because Toltec doesn't work.
If you're interested in this I would also recommend you check out Logica[0], which is a datalog-like language that is explicitly made to compile to SQL queries.
I have taken a (short) look at KOReader and saw that there's an instructions page on its wiki on how to install it on the rM2; it still uses rm2fb but it suggests using timower's version, which works on newer versions of the OS. What I should've made more clear in the post was that there are options, they're just less convenient to use because Toltec doesn't work.