>>58470167 (OP)
There's a nice epitaph if you go back and check it.
>>58470657
I thought it was Ange's activation that undid the immortality he got from the ultimate weapon, but then 
>>58471158 happened and it's just 3000 years. I guess if it was Ange that undid the effects then it would mean L would just become a regular man again too.
>>58471219
>What's odd is how Floette is spared while he isn't
My guess is that it's because Floette was revived specifically with the weapon, but AZ just got extended life as a side effect of being there as it fired. Maybe Floette is still mortal too, just with a longer lifespan as a result of more energy being poured into her.