For GPL v2 only, let's start the list with Linux and Git...
The "or later" has been used in creative ways, like relicencing all the Wikipedia content, or the Affero to AGPL transition. Nothing shady, but unexpected.
Do you trust RMS to avoid doing shady things in the later GPL licence? I do, but he is not longer in the FSF.
Do you trust the current members of the FSF to avoid doing shady things in the later GPL licence? I don't know them.
Do you trust the future members of the FSF to avoid doing shady things in the later GPL licence???