A general question about the downsides or gotchas of rlm_rest.

I used to use rlm_python3 and now want to give rlm_rest a try. On GitHub, I see the example for module configuration, but some references, like the recv_coa function/section, are missing. I haven't tried using it yet, but I suspect this might be due to outdated documentation. So, I want to ask: does rlm_rest have any downsides compared to rlm_python3? Maybe something not obvious or critical that I should consider before deciding to use it? Best regards Vladimir