The bulk update request #10298 has been rejected.

create implication age_regression (977) -> age_transformation (32)
create implication age_progression (736) -> age_transformation (32)

Reason: Both of these involve a transformation regarding one's age. Also, the wiki page for age transformation stipulates that it should be used in conjunction with the other two tags here.

EDIT: The bulk update request #10298 (forum #437630) has been rejected by @spe.

It looks like they're also used for general aged_down
post #5318636 post #5167036
and aged_up
post #5078154 post #4899060
as well as normal aging (age charts, before and after, etc):
post #4784215 post #4951658 post #5189689
which aren't transformation.

The bulk update request #10298 (forum #437630) has been rejected by @spe.

I feel like properly tagged age_regression always would be age_transformation, but Watsit's point about age_progression potentially just being time progressing would seem to be a valid use case for the tag and wouldn't be considered tf.

watsit said:
It looks like they're also used for general aged_down
post #5318636 post #5167036
and aged_up
post #5078154 post #4899060
as well as normal aging (age charts, before and after, etc):
post #4784215 post #4951658 post #5189689
which aren't transformation.

I think the former case is definitely using the tags incorrectly, but the latter case makes sense.