I've been gone for Ages, no pun intended

I have over a thousand hours (seriously) of work into many ages that I am now a bit concerned terrified that time spent might be lost and/or not realized in the entirety intended. In that light, here are my concerns:
I have used Blender 2.49b throughout my Blending experience. The latest version of Blender is "Here be Dragons" to me. I am also aware that our benevolent programmers are at work, or have been at work, on a new version of PyPRP for Blender. You folks rock, and I am forever grateful for the untold hours, days, months, years, that you have put into providing tools for us. Although we have never met, I love you like family.

My concern is whether or not I can open my source code in the latest Blender without major, a.k.a., "holy smokes Batman, my stuff is useless," problems. While using 2.49b, my modelling/texturing skills were relatively advanced. I learned a lot, and spent untold hours learning ways to making objects looks "right." I am very concerned that by continuing the ages with the current PyPRP, all the previous work will be too difficult to fix to be worth the trouble. On the other hand, it looks like the latest plugin is pretty awesome.
The singular issue with the majority of the content produced so far has been the puzzles, animations, etc. Otherwise, there is quite a bit of content that can be released as-is.
Basically, I can frame this in to a single question: Is it too late to keep working on these ages?
If it is going to be too much of a hassle to keep going with all this stuff, I intend to release all of my work as Open Source - then offer my skills to the community to help with other projects.