I realize this is off topic, but I have just purchased a used I-Book with
Mac OS 9.0 which will serve as a backup computer. (My main computer is a
G-3 running System 8.6)  I seem to recall reading that some versions of OS
9.xx were buggy. Can someone tell me whether I should stick with OS 9.0 or
upgrade to a later version. (I am intentionally avoiding OS X.)

TIA

Richard