1. Choosing 5015 spec: as if this deprecated standard's threaded mating interface isn't super annoying to handle, you'll likely only encounter select insertion patterns of this circular interconnect spec on well-designed modern systems for high power interfacing, whereas this toy uses it for...low voltage GPIO.
2. Choosing AlCd olive drab finish: likely for no other reason than it looks "mil spec". Cd is a heavy metal useful as a sacrificial corrosion inhibitor that allows the interconnect to satisfy a 500 hr salt spray performance requirement...but Cd is toxic and can be absorbed through the skin via contact. You won't be seeing much of this once preferred finish on new designs these days.
3. Choosing front side receptacle mount: makes disassembly and servicing more difficult than it needs to be, especially given solder cup termination...made even more difficult to access by a seemingly nonfunctional spacer plate.
4. Interconnect spacing: clearly unfamiliar with 1472 human engineering requirements...I'm liable to suspect the designer has never actually attempted to mate both plugs simultaneously...may be in for a surprise, and if they happen to clear, it'd be by a gnat's ass and a significant encumberance to do so.
1. Choosing 5015 spec: as if this deprecated standard's threaded mating interface isn't super annoying to handle, you'll likely only encounter select insertion patterns of this circular interconnect spec on well-designed modern systems for high power interfacing, whereas this toy uses it for...low voltage GPIO.
2. Choosing AlCd olive drab finish: likely for no other reason than it looks "mil spec". Cd is a heavy metal useful as a sacrificial corrosion inhibitor that allows the interconnect to satisfy a 500 hr salt spray performance requirement...but Cd is toxic and can be absorbed through the skin via contact. You won't be seeing much of this once preferred finish on new designs these days.
3. Choosing front side receptacle mount: makes disassembly and servicing more difficult than it needs to be, especially given solder cup termination...made even more difficult to access by a seemingly nonfunctional spacer plate.
4. Interconnect spacing: clearly unfamiliar with 1472 human engineering requirements...I'm liable to suspect the designer has never actually attempted to mate both plugs simultaneously...may be in for a surprise, and if they happen to clear, it'd be by a gnat's ass and a significant encumberance to do so.