Bapu....
That's quite a list I must say.
For me....I started with Cakewalk Home 3.0 which I'm thinking was 1994. (not DOS)
I had 3.0/4.5-5.0/6.0/7.0/8.0/9.0/Sonar 1.0/Sonar 3.0/Sonar 5.0PE/X2PE and now on X3PE.
I recycled most of those disks but I did keep ProSuite 9.0 for the MP3 encoder enabler. (not that it is needed now)
I also kept Sonar 3.0PE/5.0PE because I still have the manuals along with Sonar Power 5.0.
Now they are all archaic goodies from the Pleistocene Epoch.
Carry on...a good day to all.