The reason why the release cadence of apps about AI has increased presumably reflects the simple facts that

a) there are likely many more active, eager contributors all of a sudden, and

b) there's suddenly a huge amount of new papers published every week about algorithms and techniques that said contributors then eagerly implement (usually of dubious benefit).

More cynically, one might also hypothesize that

c) code quality has dropped, so more frequent releases are required to fix broken programs.