Да и для давешних флешек производители стеснялись много обещать. Просто кое у кого случайно надёжнее получилось. В целом же в википедии пишут:
An article from CMU in 2015 states "Today's flash devices, which do not require flash refresh, have a typical retention age of 1 year at room temperature."
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An article from CMU in 2015 states "Today's flash devices, which do not require flash refresh, have a typical retention age of 1 year at room temperature."