@cypnk One of the issues is realising at the time what is and isn't long-term. I have "junk" email addresses I've set up for things I think will be temporary, only some of the things I've signed up to with them have turned out to be still useful years later. So another key is maybe to check your email logins once in a while, and move some of them.
I had to do this over the last couple of years due to using a .eu email address since about 2014 and subsequently half my country's population voting to exit the European Union; though in the end I have been able to keep my .eu domain (by leasing it to a company in Ireland) I had to move all the more critical stuff to my .uk email addresses just in case this agreement is not sustainable long term..
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