There are many good game devs out there, but no other game dev even dream to reach the level of factorio devs. Communication with community and actually taking their suggestions into consideration, constant and fast updates & fixes, weekly dev blogs... those are not trivial things. You, my dear ...

I don't know if bug or working as intended. Angel's Petrochem has an option; angels-enable-acids=Adds Petrochem Acids to Refining and Ores angels-enable-acids=Changes Leaching recipes in Refining to use different Petrochem acids and if enabled also changes acid requirement of Infinite Ores When left...