It's just a name. Hand-watered/passive hydroponics has been a viable method for growing plants for centuries. People were using wick material, even old strips of t-shirt material to bring up moisture into the root zone since at least as far back as the 1970s, and some were growing in containers in which they'd modified the bottom portion into a reservoir of sorts in the mid-1990s or maybe even earlier. The... err... whatchamacallit, one of the Seven Wonders of the Ancient World - Hanging Gardens of Babylon (whether or not they were actually in Babylon) most likely were grown using passive hydroponics.
It's like "scrog." People have been using a screen to promote branching, maintain an even canopy height, so they could just park their lights at one height and leave them there all the way through vegetative (and, depending on circumstances, partway through the stretch portion of the flowering phase), and to increase yield for
decades - because they had a need. If you grew cannabis with numbers of closely-spaced 4' and/or 8' fluorescent tubes (because that's the lighting technology that was available at the time), sooner or later you ended up deciding that you wanted decent buds, so you looked at the capabilities of the lights and adapted your growing style to suit <SHRUGS> Someone comes along and puts a name to a simple thing and suddenly it's "a thing," lol.
Even something as simple and common sense as training one's plants - which people have been doing almost as long as they've been growing them - was just something that people
did. I mean... You grow ONE plant that grows as though you've got 32' ceiling height and 1,500-watt HPS lighting... and you just naturally train the next plant you grow (and, likely as not, all the other plants you grow from then on). It's just training them, FFS. But then some people came along and wanted to feel like they'd invented sex or something :icon_roll , so they started using terms like low-stress training (LST), supercropping, et cetera. Someone - an ex(?)-junkie, I assume - wanted to feel special, so he started calling his training "mainlining." They're just words. Put a little - or a lot of - effort into figuring something out and someone will be along shortly to stick a label on it. If you want to screw with them, you can do what I used to do and start referring to every little thing you do by a bunch of dumb@ss names. But that gets old, like being witty and sarcastic around mixed groups of people - you either get tired of seeing almost half the crowd give you dumb looks, most of the rest just continuing to sit there chewing with their mouths open, and like one chick laughing because she gets it - then totally losing her sh!t when she realizes that everyone else in the room is less than three steps above "moron" and, hey, you get tired of taking the same woman home over and over again
... or you just grow up and start ignoring all the labeling and just pay attention to the actual things themselves.
Aquaponics, that's another one. Someone stuck a name on it and, hey, look at that new growing method. Except it wasn't
new, since it fed the Aztecs maybe 1,000 years ago - and Southeast Asia about 2,000 years ago.
Err... Was that a ramble? Or was it not lengthy enough, lol?