The only reason Pein died is because he revived a whole village and had low chakra even at that point while being sick.
Even if someone who's not immortal used that tech they'd still live if it's a few or even one person. It was never stated that it was a death sentence.
The technique requires a massive amount of chakra, and as has been shown in the canon, it requires extraordinary circumstances to survive the usage of it because of the excessive drain on the user's chakra. I doubt Nagato was even sick, and his "symptoms" were more linked to the way he was using his chakra during the fight.
On SL, I have not really seen extensive usage of the technique, so how it is treated here I am not wholly familiar with. Most likely, considering that at full strength most people have substantial chakra amounts, I doubt outright death would normally be the circumstance when SL-logic is applied.
So if a jashinist were to use the tech, it would really depend on their chakra reserve at the time of usage.