Well, it is understandable. Winds are changing though...

The lack of (enough) incentive for upgrading used to be a good excuse but with 3.8 we are getting a few performance updates that are hard to ignore. Also, many projects in data sciences are dropping support for legacy Python so sooner or later data processing pipelines will have to catch up.

Yes, upgrading is unpleasant, but it is becoming a matter of hygiene.