Dresden and Hamburg, by the UK and Americans, public outcry saw this tactic end
WW2 is arguably bad example because everyone was committing crimes against humanity, worst thing humans ever did do, and today we're doing a lot of the same things that got us there
As well as most of the Ruhr area.
Do you have any sources on this? Would be interesting to read that perspective. Coincidentally read an article [0] on the bombings of Hamburg 2 days ago. As far as I know it was the tactic the US and UK employed until the very end of the war. Dresden was 2-3 months before the end of the war. The bombing of Hamburg was 2 years earlier.
[0] https://www.bbc.com/news/uk-england-43546839