Say you have a 29-year-old half-orc who gets hit by polymorph any object and becomes an elf. Will their age category go up when they reach 30 years, or when they reach 175 years?
If the former, then does that mean they’ll die of old age at 60+2d110 years despite being an elf? If the latter, what happens if the magic gets dispelled when they’re 175 years old? Are they an adult half-orc, a middle-aged half-orc, or a dead half-orc?