Crossposting one of the recent answer of @Severin when I started a new thread about this Minimal cycles to delete canister - #3 by Severin since the thread I originally started is active today.
If I can share my two cents as a developer of dapps on the IC again about this topic: anything else that a single clear data provided by IC that tells me how much cycles I should retain before deleting a canister is development pain.
Don’t misunderstand me, I don’t say it is faisable nor easy to implement such thing on the IC, definitely not, but once again as a developer, anything else is a hussle.