It's obviously true, unless Twitter employees were regularly using work e-mail for personal data. You don't need a tool to download a few performance evaluation

It's obviously true, unless Twitter employees were regularly using work e-mail for personal data. You don't need a tool to download a few performance evaluations. They haven't disabled the "download email button" because there are legitimate reasons for employees to download data (e.g. opening files in local apps), but trying to retain access after being laid off is not one of them.