I always saw magic as the benediction of ignorance,grab your finger and you have the result,sorry but i kinda felt like talking about the scientific process of magic is kind of a silly thing.
In Thedas pretty much no one has any hint of understanding about scientific process or even talk about it ,only the Dwarves with their continuing experiments and discoveries.
Qunari are little explored in truth,but they do not seem to be so advanced compared to Theodosian,yes gatlock and nothing more?
As far as i'm concerned Anders did pretty well with his bomb and it wasn't gatlock
In real life history, it took about 1000 years to get from gunpowder-like substances to regular production of gunpowder, and then another 500 years to get from gunpowder to "guns."
And by "guns", we're not talking about stuff you see in video games, but stuff like this:

I'd rather take a mage than a guy with a big one-shot stick.
As far as i'm concerned powerful explosive already exist.
Anders special milkshake explosion was powerful like that explosion created by the Orb of Solas
Why would anyone stop caring?
Having a gun doesn't make magic less remarkable, especially with the primitive firearms we're talking about here.
You can't be serious right?
Magic against high technology doesn't stand a chance in most camps,here we are talking about archers who can somehow compete with mages if they are well trained (stealth,arrows,poison ecc..).
An advanced gun will kill your average Archdemon in few shots.