This is both good news and bad news for me. The good news is that the 18FXX20 has a faster ADC and I badly need that on a new project I am working on.
The bad news is that the 18FXX2 would probably be phased out and harder to get. I have recently completed a project using this chip. Luckily, it uses the TQFP package and so I can still fall back on the 18FXX20 if I have to. I don't know about yours but I am sure the 18FXX2 would still be available during my project's lifetime.