It's more about reusing/repurposing 'old' discarded tech. Or keeping high tech going as people would do in a post apocalyptic society.
The other stuff in the magazine is very low tech indeed: their articles on hot water bottles, pedal power, very early solar power, and agriculture among others are exceptionally interesting and I'd recommend reading them.
It seems the message is really about efficiency and sustainability, not necessarily about low tech. Also, framing it as being about low tech sort of helps things but also hurts things.
For example, I was really interested to read the article about bicycles, and think they make a set of excellent points, points that don't seem to get enough attention in the cycling community. But my guess is the cycling community (to the extent there even is one cycling community), often (although not always) focused on the latest and greatest tech, would respond more to a bike being marketed as ultra-durable or upgradeable and efficient than being "low tech".
But yeah, "doing more with less" is the focus here. Skip unnecessary cruft. Not so much avoid using (high) tech stuff.
Also note that in the realm of computing (or even general electronics), high-tech IS frugal, if used appropiately. Thx to Moore's law, switch-mode power supplies, RPi style computers (or microcontrollers on the low end), e-paper / OLED displays & similar fancy stuff. Doing without those would be wasteful, imho.
There are loads of activity on perma- and frugal computing on https://merveilles.town/
#indieweb movement also has a lot of roots in similar ideologies with people going into lowtech -- so I would also check that out, but that is a pretty massive hole to dig into already :-)
So I think the point is to question the never-ending technological advance a bit, and especially its application to day-to-day life, which I think is good food for thought in general.
Solar is not low-tech but I think you need to view it from the point of being able to have a computer and internet at all, in which case you'll need some form of electricity generation.
For hunting you don't need a firearm, bow and arrow does the job just fine for most game.
> So I think the point is to question the never-ending technological advance a bit, and especially its application to day-to-day life, which I think is good food for thought in general.
Yup. Lots of elementary stuff like do you really need to heat your whole house in the winter or could you just use a blanket (or some other form of localized heating) where you spend 95% of your time. Stuff like most people won't give much consideration to because the tech is there, it's easy to use and it's cheap.