On the subject of ageing… Ch Musar releases its wines only several years after the vintage. Many people say they are not ready for drinking even then, but whether you agree with that or not the wines are certainly good to drink on release - they are not fruitless tannic monsters. So to get an idea of what they are like I would suggest you just buy one and drink it.
@NickFoster You may be right that the white is made in the oxidative style, but that does not mean the oxidation is noticable. I certainly have had some bottles of white Musar that have had (at least) hints if oxidation, but most have been fine.
The same applies to qvevri wine - in fact all the more so. Qvevris are usually sealed at the top, and if the wine is fermented on the skins it is protected by the tannins too. Only small amounts of oxygen get in through the clay.