He has set out the good reasons for doing so here and completed the work needed to prepare for this. That work includes a script to move the bug reports (about 2,600 active and completed) and insert a link into each message indicating its new location.
It's great to have such an effective contribution - thanks Looky1173 - so the Open Rails Management Team (ORMT) are going to go ahead with this.
The steps involved are:
- test Looky's migration tool by writing to the Open Rails test repo
- use the migration tool for real
- add a general message at Launchpad.net to direct users to GitHub.com
- change the code that takes the user to Launchpad.net after a fatal error
- change the links on the openrails.org website
- change the links in our GitHub.com entry
- change the references in the Manual
- change the triage code (a script that checks the status of each Pull Request and compares it with bug reports)