Maybe someone could make a pd patch to dynamically calculate this so that we can be sure to be ready for the arrival of ver1.0 ;)

Taking into account that Pd was started around 1996, assuming a version number of 0.00 then, it now has reached 0.41 in 2007 and thus will reach 1.0 in 2022.

A different calculation is less optimistic: As the current speed of version numbers is about 0.01 per annum, it will take another 59 years to reach 1.0, which is 2066.

Or Pd may do as Ardour did: Just jump from 0.9999... to 2.0 and leave out 1.0 entirely.