In the last 5 years, 5 Orcs have age-died.

One did sub-100 hours due to some specific gear.
The other three lived to 470, 543 and 642 hours (overall above the stated average of 515 hours).
Loqloq lived to 341 as the only exception.

In the last 5 years, 6 Felar have age-died.
All except one lived above the stated average lifespan of 586 hours.
The one (Rakiza) age-died at 150 hours, due to intentionally wearing +age equipment (yet people still assumed wither was responsible).

In other words.. wither is never responsible. Let it go.