I have to declare an interest in the archives, because they are how I found MN in the first place when my head teacher asked me to research a subject for a governors' meeting.
I googled & came across a massive hard-hat-and-popcorn thread that started off on one issue & ended up with one poster defending herself vehemently against unanimous opposition on another related issue - oddly enough that poster was none other than LH under her original name...
The standard of debate (and, because I am an incurable pedant, of the spelling and grammar) made me think this was no ordinary forum, so I investigated further, and pretty soon I was hooked.
But, in any case, I do still find the archives useful - starting a thread on, say hot flushes, might bring in a dozen replies, possibly 20-30 if you're lucky - but searching the archives gives 500+. And it meant I didn't have to start a thread giving details that I might not really want DD, who also uses MN, to read.