An old box running Debian 8

[Miroslav Skoric <skoric@uns.ac.rs>]

I have an old comp (CPU Pentium II Celeron 400 MHz, 224 MB RAM) running 
ham radio server in Debian 8. It works well in CLI, but very slow after 
starting GUI. I wonder whether it would be worth to try (if possible at 
all) to upgrade it to Debian 9. Any experience with such old boxes?

Misko YT7MPB