Water just heavily increased the probability for your phone early retiring.
If say for healthy phone the time before 50% fault chance is 5 years of everyday service, you shortened it maybe as twice.
Yet it may be fully conditioned for next 10 years. Or be killed tomorrow from other reasons...

I'd start to collect money for the next device. But would never rush to buy it before the days of the current one are over. it's not a too long wait those days, you have plenty of sellers.

I always have near my old Motorola Atrix with a parallel SIM card. Helps me when I overplay to much with ROMs and kernels.