(Concern) Do I need to treat the tooth that was filled 30 years ago again?

There is a tooth that was heavily treated and crowned 30 years ago.

There are no inconveniences so far, but the part where I received nerve treatment was probably amalgam(?).

The covered part is half tooth-colored on the inside and half stainless steel.

I usually hear that such treatment fillers also have an expiration date.

Amalgam is bad for the body, so the bad stuff has probably already been fully absorbed into the body.

Is it better to thoroughly examine everything at some point and then treat everything again with the latest materials?

Or should I just keep using it until I get older and become bent?

I'm curious.