Good question.

I'd also like to ask GP whether they think 1.5-3g a day is a low, moderate, or high quantity in a day, in their opinion.

Not the GP but in my experience that is moderate for a habitual user (i.e. "occasional" users do not fall on this scale). Averaging an eighth of an ounce of flower or a gram of concentrate every day would be considered high usage and anything over a quarter ounce flower or two grams concentrate a day would be extreme (at that point you're getting more than a gram of the psychoactives a day, let alone all the other cannabinoids).

As a heavy stoner in the midst of a quit, I'm very surprised by the numbers you gave. I would characterize 1.5-3g as "heavy smoker", 1/8 oz/day as extremely heavy smoker, and 1/4 oz/day as unbelievable.

To put it in monetary terms (error +/-50%) this is about $20/$40/$80 / day, respectfully.

I don't intend to change your opinion on this, just sharing my perspective.

I think you're just out of your league ;)

I'm also surprised you think 1/4 oz a day is unbelievable. A smoker with a 2 pack a day habit can easily smoke through a 1/4 oz by just replacing half a 0.5g cigarette with cannabis (40 cigs x 0.5 gram => 10g cannabis + 10g tobacco). When I was using concentrates heavily and pressing my own rosin, I was easily using up to an ounce of flower on my worst days (with 15-25% yields by mass).

It's definitely a very fuzzy and subjective scale. Personal experience plays a big part and I suspect heavy smokers anchor around their most common daily average - I suspect you smoked 1.5-3g a day?

I smoked more than 3g a day, thats why I’m making these comments.

I don’t really appreciate the outta my league comment, but I’ll take it as a joke. I just am surprised to see these numbers normalized in a discussion. I think we’re just using different definitions. All good,

I definitely think I'm smoking more than most people but I don't think I'm that extreme. Maybe 80th percentile, not 99th.

It can vary pretty wildly. I've dialed back my consumption to an ounce of ~19% THC strains per two months for financial reasons. Which falls in line with some of my peer group (mid to late 30's friends). But I also live in a state where its still illegal recreationally so I don't have a shop around the corner yet. Meanwhile my friend in the same state with a medical card has a habit of grabbing their largest bong and pounding out 1 gram bowls sometimes consuming an ounce a week of 20-25% strains. Even if I had the money and access I doubt I could pull that off.