You said stonecrafting. I just told you to make something else out of it, IE CHAIRS. Don't change your story. Masonry is not stonecrafting.
The point was, and is, not that stonecrafting is useless (it's not), but that it is NOT what you said it is: the best way to make money. In fact, if you are going for wealth, it's a waste of dwarven labor.
You can plant and harvest 10 10x2 farm plots, process all of it (to syrup, if you want to be rich) and make syrup roasts with proficient cook/grower and brewer/grow you embarked with, and have a wealth of well over 1 million in a year. That is with the labor of only 2 dwarves, you see. Or you could set all your dwarves to stonecrafting, and nothing else, and come up with a wealth of around 100k if they all embarked proficient and you aren't using flux or obsidian. If you are, big whoop, you're not getting anywhere near the wealth of food.
The same can be said for almost anything else. An engraver can be set to smooth stone for a year and then engrave all of it, and pull in around 200k in wealth. My point is that if you want to make money, you're way off base to say the best way to do it is with stonecrafting. Stonecrafting is one of the worst ways you could attempt it. A legendary stonecrafter with obsidian can turn out around what, 100k? 150? and then you have to use a ton of other dwarves to haul it, bins, lots of storage, and face lag from the huge number of items created.
Just trying to prevent your comment from misleading any newbies. I find it sad when people say "I'm on my 10th fort in year 14, and I have 1.32 million wealth" because they read some incorrect advice and take it to heart. For the record, my 6th and current fort was at 11 million at the beginning of year 6. And I'm focusing on military, NOT wealth.