it's a fine line... ppl will do something with no baseline understanding and assume what they did had a positive effect.
There are things you can do that will stress the plant and it may cause an increase in trichomes, but that alone is not evidence it is a net-positive effect.
RH% is something you can control that can improve trichome production. A little drier and the plant will produce more... at some point it is probably a negative, but early on probably okay. You also have to worry about how this impacts VPD... this is what i mean by ... it may cause a result you want to see but what is the total net impact including whatever damage it did?
Without a huge sample to establish a baseline, then testing the hypothesis, i wouldn't believe any anecdotal thing you read.. try it sure, but don't have high expectations. The 48hours of darkness is another. I've heard of tests done with appropriate equipment showed it did increase trichomes, but what did you lose by depriving it of 2 days worth of energy? a marijuana plant will start to shrink, yes shrink, when given less than 20 DLI or there abouts... somewhere below that will be a point where the energy received cannot build new growth faster than rate of decay/death. Simple math.
in the end, genetics are what matter, if you can grow a healthy happy plant from seed to finish or at least finish strong after any low-percentage or out-of-our-control hiccup. There is nothing we can do that will turn a pig into a princess or prince. Any effect this stuff will have, if it is truly positive, will be minimal compared to the effort the plant has put into growing flowers for 8-9+ weeks. Rome will not be built in a day.