How 'bout old threads get locked but the post button turns into a "continue discussion" button that starts a new thread with a header link to the previous thread? e.g. "Posted in reference to [url="old-topic-url"]this topic[/url]..."
Abacus Model 2.5 | Quad-Row FX with 256 Cherry Red Slider Beads | Applewood Frame | Water Cooling by Brita Filtration