[2023] Assists are Absolutely Shadow-Nerfed.

There was no shadow nerfs, nor for economy, nor for assists.

Last changes related to assist mechanics was AFAIK in Dragon Age Major Update:

Conditions for crediting serious damage to ground vehicles have been changed: destruction of optics, wheels and also partial damage to the barrel and cannon breech are no longer considered as serious damage and can not lead to vehicle destruction assistance.

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You literally got them listed in changelog. How is this "shadow nerf"?
Your point stands? No examples, nothing.

Here is detailed wiki article on assists with info when there is a timer, when timer is off etc.

https://wiki.warthunder.com/Destruction_credit_mechanics