The big problem I have with the RNA world idea, and its experimental implementation, is that it runs in a soup that doesn't seem plausible.

RNA gets made from pure, energy-rich molecules that themselves are quite complex. This soup of pure monomers isn't something that just arises naturally in the absence of life. Prebiotic chemistry produces a random soup of a wide variety of chemical species, with the abundance of each declining exponentially in its size and complexity.

You see this issue all the time in origin of life claims. For example, that recent result of "all the bases of RNA and DNA were found on this asteroid by the Japanese" tended to slide over the fact that they were there at extremely low levels, mixed with huge numbers of other non-biological organic molecules.

Trying to replicate RNA in a mix of random crap will just give you polymers of crap, if it gave you anything at all.

OoL needs an idea that will work in a soup of junk, not in massively artificial pure soup on a lab bench.