well anecdotal ecidence suggests all of the effects start to diminish over time. anabolism, fat burning, etc.
a general rule of thumb ni think ifirst heard from patrick arnold.. if one of the effects dissipates, all of the effects are dissipating.
in order for stavy to feel the night sweats again hed have to up the dose. at which point hed not only start having trouble sleeping but also put on some muscle and lose some fat as well.
well, personally i never got night sweats from tren (i'm sweaty regardless), and insomnia i've always had, and my sleep was no different on tren except when i got tren oil into a vein before bed. stavios might just have never experienced the sides, people respond to tren so differently it wouldn't surprise me if he had no sides on it.
second thing you talk about, i don't think that the anabolic effects of steroids ever dissipate, they still have the same actions at same dosages with regard to binding and activating androgens or increasing protein synthesis and retention.
However gains do definitely slow down on cycles but i think it is independent of the steroids (disregarding people who hit their 'genetic limit' and won't grow further without high dosages + gh) and i think rather, it is a metabolic response to gaining a lot of mass.
i read a theory proposed on another board, about priming the body to grow when stagnation sets in, and it makes a lot of sense about resensitizing cells to once again want to grow and accept nutrients. i think it can be comparable to how obese people can lose fat relatively easy, without much effort, but someone at 6% bodyfat will have an enormously difficult time shedding bodyfat because the body is resisting and trying to be at it's desired homeostatis, of what's probably 15% bodyfat and around 180 pounds for someone 6'