Do email addresses last forever?

As a cryptocurrency and finance professional, I often wonder about the longevity of digital identifiers like email addresses. Do email addresses truly last forever, or are they subject to the same fleeting nature as the blockchain technology they often facilitate? With the ever-evolving landscape of online communication, it's crucial to understand the stability and reliability of these essential tools for conducting transactions and maintaining online presence. So, is it SAFE to assume that email addresses are a permanent fixture in the digital world, or do they face the same risks and uncertainties as other digital assets?