With confinement being the challenge, wouldn't duration of the containment at those temperatures be important too? I see Wendelstein 7-x is attempting 30 minut

With confinement being the challenge, wouldn't duration of the containment at those temperatures be important too? I see Wendelstein 7-x is attempting 30 minute burns soon https://www.ipp.mpg.de/4413312/04_18?c=4313165 https://www.ipp.mpg.de/4413312/04_18?c=4313165