They fixed a bug in gardening that made perfect harvestables increase over time. If you harvested and held them instead of selling they would increase a lot. Now they reach a limit and stay there.
If I am looking to build wealth, I never have my Sims work. They can make more at home. I use a combo of collecting, gardening, and painting.
I find retail sale to not be all that useful unless you live on the lot and use the time it takes customers to decide to buy doing something else.
If you have CL you can sell paintings and collectables at 300% profit using the flea market tables. If you sell them in a retail store, your top limit is 200%. I do often buy a retail lot, but son't actually open the store. I use it as a second home and bank account so I can divide funds.
