Even though we are hijacking Dulcamara's thread here, I'll pitch in:
Yes, the number of agebuilders, writers and coders has dropped over the years.
That said, it's really encouraging to see that so many of us remain active, as time permits in our lives.
Also, keep in mind that around the globe there are active individuals and small teams continuing to slowly develop projects over the years - even though they may not post on the forums.
All told, I'm always amazed at the sum total of behind-the-scenes work going on at any given time - even though we don't witness it on a day-to-day basis.