Reminds me of Zippers. Ubiquitous and seemingly "simple", making one that is reliable for years is extremely complicated and there have been similar issues with

Reminds me of Zippers. Ubiquitous and seemingly "simple", making one that is reliable for years is extremely complicated and there have been similar issues with Chinese made ones: https://slate.com/business/2012/04/ykk-zippers-why-so-many-designers-use-them.html https://slate.com/business/2012/04/ykk-zippers-why-so-many-d...