18 years for me. Wow.
It would seem there is a "core" of people that have been here over a decade - the place used to be "hopping." I think the decline in activity is mostly (98%) due to the proliferation of social media, which I abhor. Personally, I think "socmed" is is the primary catalyst for the decline in critical thinking - undermining objective reasoning and ushering in the age of Trumpism and "fake news."
Since we are also comparing computer experiences, my first PC was a Kaypro II - ran CPM, with 8" floppy disks (they were actually "floppy" - lol). I used it to log into "bulletin boards" through a dial up modem, coded in Basic, wrote papers in Wordstar and juggled numbers in VisiCalc (a rudimentary spreadsheet) .
Prior to that, I learned on punch cards in college - Fortran, Cobol, SAS. Ever drop a stack of 5,000 cards? Technology has certainly come a long way in a short time...