H.A.F.
a.k.a. Rusty Nails
If you are a home grower it goes right back to what your goals are. Look back 5 years ago before they invented VPD. Everyone still grew dank.If you follow VPD guidelines...
Again this is just my opinion, but ALL of the prerifferal stuff to growing the plant that has changed or "improved" over the years hasn't fixed or improved much of anything, except LED's. Less heat and more bang for the electrical buck both from the lighting and the climate control needed with the older bulb-lights. Not to mention regular bulb replacement because of age in those lights.
VPD monitoring and charts happened to come about right when the technology to pick gnat-shit out of pepper became possible. Side by side how things perform with and without VPD monitoring and controlling equipment is never going to matter for the homegrower unless you get to the 20-lighter stage.
If you need weight to pay the rent it's hard to convince me that the small percentage in yield gain is worth the investment in time, electricity, monitoring and control equipment, etc. and actually pay a dividend you would need to be the master grower from cannabis university and on point 24/7/365. I have no humidifier, de-humidifier, or monitoring equipment other than a temp/rH guage in each tent that I can look at on a desk-top monitor but never do. If I had to grow for weight I think I could do that with growing techniques (pruning/topping/training) and not have the expense of the VPD's.
Not to mention the people that keep their VPD on point then talking about intentionally stressing out plants to get them to express terps
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