Jaja,
We're not talking about one engine out situation phase and it's phases. And I didn't talk about delaying thrust reduction. Just saying that in a normal climb-out, you could delay the accelerating needed to retract the flaps.
Also the SID IFLY_INDIGO mentioned does not mention the word average. If I were to depart from an unfamiliar airport in mountainous area In IMC with a sid mentioning a required climb gradient of 7 %, I would make sure to stay above the required slope all the time!
Of course, by day in CAVOK or at an airport I know, I'd be happy to retract the flaps as per SOP.