[muzani]

Generally, the older it is, the harder it is to redo. There's a lot of undocumented bug fixes that accumulate as a project gets older. Some things are so bad that you just can't do anything with it and it's easier rebuilt than done.

Often it's best to have high test coverage when migrating. You can push this to be part of the current project if it's not there and it's some productivity anyway. I usually skip things that test/mock the code and just do things like UI or API tests.

Migrations may take much, much, much, much longer than anticipated. If you have a gantt chart of some kind, make sure it's not reliant on the migration.