Yeah its poor stability is pretty much why DNA is better for storing and passing information from generation to generation as it is quite vital for information to remain unaltered. The RNAs in the prebiotic world were suggested to have methylated backbones and this somehow made them much more stable than they would normally be (i dare to say, almost as stable as DNA :p). It sucks that its poor stability has made its diverse use in therapy a bit far from reality.

Thanks for reading through ! Cheers !