Some reasons for migration
You have hundreds or thousands of articles and/or users
You have a online shop with hundreds or thousands of products, orders etc
You have a large photo gallery and it will take too long to add all the photos again
You have a large forum and you don't want to lose all the old posts
We have extensive experience migrating old Joomla 1.0, Joomla 1.5 and Joomla 2.5 websites to Joomla 3 and Joomla 4.
Many projects have included migrating thousands of pages and users and data from various extensions such as Virtuemart. Although there are migration scripts available to migrate some of the most popular extensions, many do not. In most cases we can still help by creating a custom script to bring the data into your new Joomla website. In fact, we can also migrate data from any database driven solution into Joomla.