Anyone can change and its never too late.
EDITED
In any event, it doesn’t matter. I’m not abandoning doing mitzvos. I’m not going out and eating pork and saying “what does it matter?” Nor do I have any plans to abandon observance of the mitzvos at any time in the future.
Furthermore, I can’t do teshuva because I don’t regret most of the things that cause me to lose my chelek in olam habah anyway. I went over that in another thread (sorry, I’m too lazy to look it up now).
The Wolf