When did you first treat your "Studio"/mixing room ?
I took mine out for a drink last Tuesday.
Back in the day...way back when I was using a 4-track R2R..."treatment" was whatever you did to keep the noise down so people wouldn't complain (in whatever room you could find to use).

I also recorded stuff in our band practice rooms...which was everything from a basement below a restaurant...to a rented space in a daytime office building (we practiced at night)...to huge empty warehouse style halls...to a spare bedroom & foyer in my parents’ house that I used for about 2-3 years to just record in (after "THE" band went bust).
Then after that, I had a more "formal" recording space in another house...a couple of smaller rooms...but not much in the way of acoustic treatment. It was more about jamming the walls full with insulation to keep things quiet.
My current space I actually treated right from the git-go, with acoustics more in mind than soundproofing, since there's not as much worry about making too much noise for any neighbors. Though even doing acoustic treatment had a good deal of soundproofing effect.
I'm still planning to install 6-8 bass traps in addition to what I already have just to see if it will clean up the low end even more.
It does make a difference…but yeah, when you’re having trouble deciding on the $59 or $100 USB mic…and someone starts talking about all the acoustic treatment you need to do before worrying about the mics…

….it’s kinda hard for those newbs to get what they are being told.
I think everyone SHOULD go through some “progression” anyway…rather than just diving into a full-tilt pro-ish studio setup as a total newbie. There is a value in making some mistakes yourself and learning from that. You can’t always get that “learning” just by reading what others have already done.
I kinda hate when total newbs come and give a list of stuff they purchased and then they ask..what now?
Man...fuck with it!!!!
Experiment a little...don't always ask for someone to tell you what to do.
