@Anomareh, wow, chill out. Upgrading to python 3 is the only way to move forward. The fact that it's not backwards compatible is old news. Get over it.
umm, how about... no. I don't really get the point you're trying to make.
To clear up the money issues that some people (cough Anomareh) don't seem to understand:
(1.)Your ST2 license works for ST3 while it's in beta.
(2.)Considering that ST2 was in beta for about a year, I think you'll be okay. (Not to mention that ST2 was in alpha for a lonnnnng time)
(3.)An extra $15-30 really isn't asking much.
Also, ST3 is fast as fuck. You should get it.