Since I only follow 6 or 7 threads I have this problem a lot. Over 80 threads would need to be read...whew, where are my glasses?
with Weedwhacker; just read enough to get the gist. If there is something specific you are looking to find in the long thread you could use the Control F which will highlight specific words or terms, but you have to do it for each page.
Taking time to read through entire threads you do start to see a pattern emerge. Certain members appear as positive voices offering kind statements and encouragement, some as negative or argumentative, some have inquiring minds and throw more questions into the mix. It's all good - especially on a cold, rainy winter day.