Would it be possible su have space-age as an optional dependency?
Could this mod be of help? https://mods.factorio.com/mod/enable-all-feature-flags

What do you mean by making space age optional? You want to play without space age only or without quality, elevated rails and space age? Space age in my mod marked as dependency because in previous versions belt parser was hardcoded and it was crashing on turbo-belt detection. So technically if you want to play without space age i can make it as optional, but quality will be still required. Also thank you for your feedback! It really helps me out to make mod better!

Hi there! I've taken care of your suggestion. Now space-age is marked as optional dependency, so now you can play factorio in more "vanilla" style while enjoying quality belts. If you want to suggest something let me know!

Yes, the intention is to play with space age disabled but with quality and elevated rails enabled.
Thank you for the quick reply and hard work!