On some MacBook models (Intel), there was a sensor for this that you could access with the iStat menus app (among other ones) that did the same thing - it measu

On some MacBook models (Intel), there was a sensor for this that you could access with the iStat menus app (among other ones) that did the same thing - it measured the power/current at "CPU Computing Highside", or in other words before the main ~12V bus that powered the CPU. Was interesting to compare the CPU package power and this figure to see the "efficiency loss" in the VRMs. Tangentially relevant but since you mention Aussie50... brings back the memories. At the end of primary school, I used to watch Aussie50 on YouTube a lot, and discovered a number of excellent engineering channels they were associated with. He was very good at explaining how various machinery worked, and YouTube videos like these played quite a role in getting me interested in tech. Sadly there won't be any new videos anymore, but hopefully the channel stays up/someone has a backup of it.