I see your point. But I also find it curious that just because others point out that a zamak razor isn't as durable as a stainless or brass razor that they are hating on the zamak products. Most are not. They are simply pointing out that the materials it is built with are not as durable.
I've only had one modern zamak razor. It was a well known european brand. Loved how it shaved. But after only a few months of use (not even everyday use) I noticed plate loss and corrosion on the threads. I did not abuse this razor in any way. I didn't use it to failure. I just stopped using it. But the writing was on the wall. It was going to fail at some point whether that be a few months or a few years down the line.
No it didn't cost very much. Only a third as much as my Rockwell and half what my vintage fat boy cost. Some people are ok with viewing their razor as a disposable product. Nothing wrong with that at all. I just personally prefer razors that will last decades and not a few years.
Point well taken. There are always quality control issues or luck of the draw so to speak. I've bought five zamak razors and have never had issues with plating or alignment. The fifth one was a Merkur 34c which I gifted to a friend who was having issues with a Perfecto I gave him to start with. I think it comes down to is how well was it plated. I wish Muhle would change the screw to brass like Merkur and wish Merkur's plating was as good as Muhle...but that is why I have spare parts.