When they moved out yes. No longer feeding, reduction in bills, no extra san pro, clothes, makeup, toiletries etc.
Yes, I still treat them (as they do me). But it's not a weekly expense like when they lived at home. When they moved out, they already had savings and did things like furnished house shares so they could carry on saving, and of course, taking their furniture and stuff they'd bought when still living here. I did give them some cash towards some stuff but not expected.
Occasionally they borrow from each other and me when been between jobs and one was on statutory sick so we all helped her and told her to not pay us back.
For me bringing them up it was important that they knew to not be financially dependant on anyone, to live within their means and plan for the future. Financial mistakes (blowing a whole month wage in a week etc) was all done when they still lived here so had a bit of security.
I even did the whole saving their rent money. Backfired as they spent it on me when I wouldn't take it back as the money was always meant to cover their costs.