Use the strings your guitar likes (to quote Tommy Emmanuel)
I use 80/20 on my hog-ceddar Om, which I usually run through PA... But I wouldn't use it on my spruce-rosewood Dreadnought.
Glad they exist though for my Om!
Btw I came to this forum today for a bit of wisdom on these strings, because a clerk in local shop tried to convince me that " 80/20? No sir, never heard of it . They never produced anything like that. What is it supposed to mean, anyhow?)
I know the wire, chosen by D'Addario in the 30's, is supposed be brass but is called bronze for some reason and I was sure I'm gona find out here and I can lecture the clerk next time... and the first topic on the main page was "80/20..meh or yea"
If I believed in divine signs, this would count. Now off I go to the search bar, the noble history of steel strings awaits!
Update: I didn't find anything reasonable. Can anyone confirm that the guitar industry simpy calls "brass" the wrong name "bronze" ouat of tradition and that's that? I mean these people would know the correct name of an alloy they are selling worldwide for allmost a century.
I also read on wikipedia that archaelogists ceased to use these terms and simply use "Copper alloys" instead because there are too many different types.