I hate to say it folks ,
P5 never seemed to gain traction with most SONAR users even during The Golden Era of P 5 .
The truth is P5  was a hard sell on a lot of levels to many SONAR users .
To P 5 's credit the cost was low and it had features out the Kazoo .Yet , I know first hand that most SONAR users couldn't wrap their heads around learning P 5 ....nor could they see the benefit of using P 5 over their beloved SONAR.
I have no idea how well P 5 did outside of the SONAR Eco system in The Wild .
 
FWIW , that is my take on it . Some of my history w P 5 .
 
I was a proud and vocal user of P 5 . I started using P5 around late 2005 , I liked it so much I tried when ever I could and did my best to hip people and SONAR users to P 5.
The Project 5 section of the Cakewalk Forum was one of my favorite sections of this forum .
The P5 section of the forum was vibrant and it consisted of many very talented musicians that were hard core P 5 users.
Although I loved and used P 5 a lot I never considered myself an expert on P 5 . It was quite the opposite because I learned a lot from many of the forums active P 5 users.
Some people were putting out tunes made in P 5 like crazy over there .
We even had a very large list of tunes composed , performed , and made ( solely in some cases ) in P 5 listed by artist.
Speaking historically , it all went bye bye over a period of time  .
 
I have been vocal in the past about my feelings and experiences concerning P 5's fate  ...
It just gets real old taking about it because the people that could do something about P 5  don't.
 
In my case I do have P5 on one of my Win 10 64 bit lap tops .
My experience using P5 on that computer is this . P5 runs circles around what I had performance wise when I was using my XP DAW / dedicated music computer .
I mean lets face it 10 , 11 , 12 years onward from P5 s time of hardware to now where we now have more robust computers plays into that heavy ...
 
I don't use P5 all that often these days , but P 5 with all the unlocked stuff from SONAR and much of my 3 rd party synths and plugs is a true joy to behold ...
It is scary good at how robust P5 still is considering how much time has passed ...
 
Kenny