I am actually seriously beginning to believe that my particular niche is starting to weaken.
I would venture to say that there actually may be less searchers since many people now have 17+ years experience of looking for their particular niche favourites and probably do not need to visit as often.
In my specific global niche we started to notice this trend after the 2008 crash, obviously trade fell dramatically, in the case of the USA it's largest wholesaler lost 50% of its business, down from 4,000 containers to 2,000 p.a. In 2016 they did 5,500 containers with very little increase in website traffic over the past 4-5 years.
My companies have experienced differently since we were dominant in our trade for images, the Google theft put paid to that however since then our traffic has been remarkably steady BUT our realworld business has increased markedly. It's as though the noughties was all about finding new suppliers and now having found and consolidated them, these trade buyers are not actively searching for any new supplier since they are very happy with what they are receiving.
What is also noticeable is that during the noughties we would receive enquiries daily from Joe Public whereas these days it may be only once a month.
Globally in my niche trade is up however talking with companies and their webmasters, in general all of them are seeing less traffic meanwhile their businesses are doing fine.
As an observation, 10-15 years ago I would see Monday to Friday traffic about equal with weekends at 70%, these days it sometimes seems to be only Tuesday to Thursday, Mondays and Fridays at 80% and sometimes on weekends dropping to as low as 50-60%.
After 17 years of this millennium maybe people are not so excited about The Net and have other things to do?