You might be making some generalizations from your personal experience. Since 2015, at all of my jobs, everything has been running on some sort of a cloud. I'm yet to meet a person who doesn't understand IOPS. If I was a junior (and from my experience, that's what they tend to do), I'd just google "slow X potential reasons". You'll most likely see some references to IOPS and continue your research from there.
We've learned all these things one way or another. My experience started around 2007ish when I was renting out cheap servers from some hosting providers. Others might be dipping their feet into readily available cloud-infrastructure, and learning it from that end. Both works.
You might be making some generalizations from your personal experience. Since 2015, at all of my jobs, everything has been running on some sort of a cloud. I'm yet to meet a person who doesn't understand IOPS. If I was a junior (and from my experience, that's what they tend to do), I'd just google "slow X potential reasons". You'll most likely see some references to IOPS and continue your research from there.
We've learned all these things one way or another. My experience started around 2007ish when I was renting out cheap servers from some hosting providers. Others might be dipping their feet into readily available cloud-infrastructure, and learning it from that end. Both works.