I've been pleasantly surprised by what I've been able to see with Netscape 4.8 on my Powerbook 1400 (OS 8.1).  I've been hunting around for sites that provide information I usually look for (general information, news, Mac-related sites, and some others) that will render such that a normal reading experience is possible.  With CSS and Java off, I was able to comfortably read the day's news on Compuserve's news pages(http://webcenters.netscape.compuserve.com/news/), and visit a PowerPC blogspot page I read regularly.  I had not expected to be able to view much of anything, so even these tiny morsels are a pleasant surprise.