Walk through a hypethetical ticketing system migration with your tech lead. Assume all external links are broken, and see how expensive it becomes to answer qu

Walk through a hypethetical ticketing system migration with your tech lead. Assume all external links are broken, and see how expensive it becomes to answer questions about your own codebase. "why did we add special case X? is it still applicable? It interferes with new feature request Y, can we remove it to reduce total risk/cost of implementing Y?" Integrating with another tool is fine, but not at the expense of your commit history!