If the operation is owned/financed by venture capital, stay away. Their priority is obviously not health and wellbeing.
* StealthChanger: https://github.com/DraftShift/StealthChanger
* TapChanger: https://github.com/viesturz/tapchanger
Looking forward to when I can just buy an LDO kit of one of these :D I'm not a fan of mmu/ercf.
Would love to see an open source AMS in the meantime. Just something where i can store multiple rolls of filament and autofeed a single roll before the print. For convenience.
A lot of it is inspired by the ideas of Christopher Alexander, who also inspired the notion of design patterns in software... it is an interesting rabbit hole to dive into.
This is the same for many other countries but not the case for the US. Also your first two examples applies to really small list of countries (Iran and S.A.) and their current governments are the disgrace of the world and are not really an example to take (like going too extreme and something the US shouldn't "I guess" be compared too).