Does anyone know when Mathematica Version 15.0 will be released?
This does indeed seem very unusual. It has been 9 months since the last version, and such a long gap has never been seen in the entire revision history. I wonder what happened to them.
I think Wolfram Inc never really shows their release plans. Try to extrapolate based on these dates:
https://www.wolfram.com/mathematica/quick-revision-history/
You see there is a new version every approx half year…