The Supersweet 100 seeds are from 2015, as are the Sunny Boy hybrid. The Brandy Boy seeds are from 2018. If any don't germinate, there is plenty of time to try again.
I'm also teying again with the peppers that did not germinate 2 or 3 weeks ago, and trying a very early start of some perennials, Ridbeckia, Echinacea, and Goldenrod. Interesting, the goldenrod seeds were so tiny, they were like fine dust.