> some $1500 hardened industrial embedded platform
It's just a (respectable( power supply. I'm assuming OP just wanted to say that power quality was not the issue.
it is very hard to know if your raspberry pi issue is power related if you don't do what you can to make sure that power isn't an issue.
prior Pis didn't log when they had power issues, and current ones do, if they are able to.
on a Pi 2 A (I think) I had to hook up an oscilloscope to catch all the tiny power problems I was having, and only then realized what was happening. I was 100% sure I was delivering enough power. I was not. those symptoms were only visible without the scope as weird errors in the OS and running applications, and corrupted SD cards.
The Raspberry Pi is not an embedded platform in the ways that you are using for comparison. The Raspberry Pi is an educational platform.