What's the point of this conversion? RPGM VXA runs it just fine now.
So, instead of just using the RPGM VXA runtimes, we have to download two other things for an "OS-agnostic" version.
I get that Ruby won't run
natively on Mac and Linux systems but there's always workarounds.
Sorry, but I really don't see the point.
For your edifice, here's the full size of NW.JS (I searched for the runtimes and this is all that came up):
Using the Windows releases as a baseline, the latest versions of NW. js (~0.36. x) are around 189 MB
So unless you're running Windows (or a decent Windows Emu), we're talking about 356MB vs 420MB.
Negligible by todays standards to be sure and while I get your intent (and the purpose of this modded build) I really don't understand why you REQUIRE NW.JS and the Ren'Py runtimes to be installed.