Absolutely, trichs are a decent, but not a foolproof, indicator. As you point out, recognition of a ripe plant is the best indicator. But, many new growers don't know what a ripe plant/bud looks like, and can't figure it out, even though there are super
threads with pics. So it's usually easier to advise them to use trichs as the indicator, then trying to explain what a mature (gave its all and now it's ready to die) plant looks like. If the pics aren't enough. I've tried helping using both methods and for some reason, new growers just don't seem to get the mature plant method.
Great info MYOB!
R2T