Let’s try and keep this on topic - most replies to this message has been about #9211, which is an orthogonal issue.

There are two main questions here:

1. Would the community prefer to use np.quantile(x, 0.25) instead of np.percentile(x, 25), if they had the choice
2. Is this desirable enough to justify increasing the API surface?

The general consensus on the github issue answers yes to 1, but is neutral on 2. It would be good to get more opinions.