[quote name='crystalklear64']The reason for the expiration that time was the move from 1.09 to 1.10. It changed a hell of a lot including skill animations, adding in synergies, and balancing out all the skills (lol). Usually, a patch doesn't require that.[/QUOTE]
[quote name='sendme']Well I might have to get back into it then. About 2 years ago they would expire or atleast the update they did then made them. They had said that the next update was a mager one and that all toons will expire. I had someone that I worked with at the time tell me that every now and then(at that time about ones a year 2 times a year at most) they did that. Is it still 90 days of not playing the toon and it will still expire or was it 30?[/QUOTE]
I'm not entirely sure where the confusion is coming from, but characters have never expired due to a patch.
There have been four resets so far, in which ladder characters become non-ladder, where everyone who wants to be ranked on the ladder (or make ladder-only runewords, or do the world events like Uber Diablo and Uber Tristam) must make new characters.
The non-ladder characters can still be played on the closed Battle.net servers after a reset. There are surely some non-ladder characters played today that have probably existed ever since the game was launched. Items changed, but often items found or made in the older patches retail those stats. That's why people want older Vamp Gazes (when Damage Reduction could be 25%, but in newer patches it's capped at 20% -- on non-ladder you can still find 25% Vamp Gazes, if they were found from a long time ago).
The only time a character expires -- which is the only time you can no longer play that character -- is after 90 days of inactivity.