2014 Prius problems after software update -- other years too?

I read that some owners of 2014 Priuses that have had their software (firmware?) updated have experienced significant problems -- e.g.,
sudden loss of power -- and are suing Toyota.
Is there a similar problem -- or any other serious problem -- with other model years?
Perce
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No updates or problems with my 2007.
jdh Virginia
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