Not in a sense of "signed letter", but more like a "huge feedback". Six years ago MSFT planned to reduce free storage for existing OneDrive users to 5GB (after bumping it to 15GB + 15GB of Camera Roll bonus) [1]. Like other users, I was unhappy as I have been using OneDrive with the promise of bigger storage than Google.

Sure enough, over 72k votes at OneDrive's UserVoice [2] cause MSFT to back down. They still reduce the storage to 5GB, but existing users (myself included) can opt out of it.

[1] https://www.theverge.com/2015/12/11/9890966/microsoft-onedri...

[2] https://onedrive.uservoice.com/forums/262982-onedrive/sugges...