So is it this more advanced analytics worth or just look good on paper, but not usefull in real world?
This data is, as mentioned, totally unique to Garmin. It requires sending some specific commands that are proprietary to the Edge and Vector series. It's not part of a the ANT+ standard (version 5.0, maybe in 6.0 because 5.0 has provisions for this). So combination of say Wahoo + Vector 3 means you don't get this metric (But could in the future). So firstly, you must have a Garmin Edge to use these metrics and not just the Vector pedals.
I have not seen any publications on this, and the value of most papers I've read about cycling performance related to power training use sample sizes so small that the results are generally pretty suspect. (oval ring controversy for example. Of about 10 studies published that I know of, none of them have more than single digit participants. "Publish or die" academia).
The other side is that some of the data produced can't be produced by a competitor product, let alone 2 simultaneously, so the data can't yet be validated as correct.
So right now it's a nice to have, but no methods published for analysis in any training theory books, no controversial papers yet (I hope I'm wrong, please point some out if you know them), no validation of the data or methods, and a requirement to have an ecosystem that produces (vector), records (edge) and analyzes (does Training Peaks online do this yet? WKO+ can I believe, but most sites I know of don't. Garmin connect displays the graphs and the averages but I haven't seen anyone know what to do with it yet).
So it's a feature for the nerds that want data, but not much consensus on what to do with it. Love if someone could point me at something that says otherwise.