Saxman, all... I know this may be played out (until/unless Apple addresses the resource-hogging of Safari), but want to do a quick follow-up. Clearly many share the frustration (and/or annoyance) at seeing Safari soak up and then paralyze system resources on an ongoing basis, with few great work-arounds beyond reboots, etc.
My comment is this: On alternate browsers. I 'get' from the forum that many here are power users and also know it's human nature both to experiment and to adopt 'favorites', for numerous reasons - functionality, appearance, bells & whistles, etc. So preferences vary, about alternatives to Safari (though there is a lot of agreement about the very real issues specific to Safari itself). Here's what I can add after reading about some users finding Chrome to be a hog too, and various other comparisons (based on bench testing or personal impression/experience).
I've been working on projects (book and articles and websites) requiring the usual, text and photo editors, etc. That's the reason for having many tabs open, as I cross-reference articles, hunt for a graphic, etc., during the same session. This is what I thought was the major reason for Safari's hoggishness - many tabs (up to 70/80).
I read about Chrome's separate-process design and gave that a go. Despite what one or two have said about Chrome getting gunked up or frozen just like Safari, I must disagree. For the past few weeks I've totally avoided Safari and my working tabs (again, many) are open on Chrome. Even with image-editing, Office for Mac, and other apps/programs running, I always see about 1/4 of the Activity Monitor green (free memory) now. AND... As I've been fine-tuning and closing tabs as I finish with them, no problem. AND I've now taken to having Opera open as well, for 4 or 5 tabs of short-term researching some particular thing side by side with an open Chrome page. I can even use iPhoto simultaneous (though that does push it close to full memory), but in sum, with both dozens of open Chrome tabs, plus a few tabs open in Opera at the same time, other apps in use and all, I have *never once* had the kind of freezing, wheel-spinning, etc. that I got almost every day when using Safari. Thus I again conclude, the issue is Safari. I like both Chrome and Opera (Chrome more for Google platform functionality), and both seem to be vastly more useful and reliable than the always-spinning and resource-hogging Safari. For me, that's the bottom line. I'd still *love* to use the 'native' browser, the Apple signature - if it worked. Hoping to someday hear the announcement that it's been resolved, after years of user complaints. Til then, I'll continue to enjoy my well-working Mac, humming along like I expected, given all the RAM. But using a browser that works.