WordPerfect 5.1, complete with the Ctrl / Alt / Key list on small card next to your 80286 desk-top PC. A short period in time before the Millennials were conceived...
By some definitions I fall under the "millennial" moniker ('83 vintage) but I can say I see quite a huge gap in general mindset, not necessarily for the better or worse, just different, between millennial born before or after the noughties. Trends will always come and go.