Well there are still plenty of games using the 1.5 kernel and I think it will most likely stay. If not there is going to have to be some way of emulating it or such because I really doubt all developers are going to take the time to rewrite their games....
Ooohhh...
On PS2Dev forums, you MENTION the 1.50 kernel... they go bizzerk!
All developers that are still on the PSP scene have to do their application in the
3.XX 4.XX kernel.
I changed piKey so it works like that! The process is really easy!

Angelo