I got a bit confused by the statements in the thread. If the issue is downloading wheels to check dependencies, mamba should be a better alternative, as not only it is downloading packages in parallel but it uses a different dependency solver.
Given the amount of unique objects and texture maps in the game, this is not a surprise, specially thinking that graphics are the biggest selling points of today's consoles.
I was constantly reading/writing config files and the structure and comments were what convinced me TOML was worth to try. I did end up going back to JSON for the schema validator bit, but I just found out that TOML is still working on it: https://github.com/toml-lang/toml/pull/116