….why not buy when have to to?
If you have a major calamity, that could be a bit late.
In the old days you had to wait to get your DiscWarrior disc in the mail, and that was unacceptable in the face of a calamity, but now that DW can be d/l'ed it's never too late as long as you've got a bootable volume.
DW may not be terribly pricey over the long haul
*, but the latest upgrade is
awfully pricey, and while it has got new extras, it doesn't improve on the functionality of an app that has, let's face it, gotten less and less important with each new version of OS X.
I'm with kevs on this one: I'll buy the upgrade when I
need it, when "What if?" has turned to "Aw @#$^! What the %^&# do I do now?", not on spec.
Edit:
*And all those "Only x¢/month!" items
do add up.