How many artifacts are in Maven Central Repository?
GAV = GroupId & ArtifactId & Version (for example 'junit:junit:4.12') - basically it's a "project's version"
GA = GroupId & ArtifactId (for example 'junit:junit') - basically it's a "project"
All artifacts:
GAV count:
4,877,755
GA count:
329,903
Maven plugins:
GAV count:
64,185
GA count:
5,297
Maven archetypes:
GAV count:
36,775
GA count:
2,563
Chart on the right shows the age of projects in Maven Central
(for every project I computed how old was it's last
artifact's version (GAV) at the end of every year).
Currently (stats for 2016) there are over 47%
of artifacts which were updated within last 12 months.
A little bit alarming is a fact that about
37% of all artifacts were not updated within last two years
... maybe because they were abandoned
by their creators or maybe they are stable enough
so that they don't need an update? Who knows?