I’ve read it somewhere else but I don’t remember where.
Could you confirm that the data quality system no longer has any effects on anything (editing, voting, etc.), apart from showing its value in the sidebar?
Update
I found the information back from a previous post of mine.
It’s in its definition, data quality has no effects, anymore:
Currently, data quality has no further effect than helping users know what to expect from the data. Until 2012, data quality also used to influence the voting requirements for edits made to the release. While this is no longer the case, we mention it here because it can explain the notes and voting results of some very old edits.