Support for old software versions will once cease. That is not different for Joomla. Recent outdated versions can be updated without too many problems to newer versions.
Very outdated versions might require a migration path.
Website migration from Joomla 3.x
To migrate from Joomla 3.x to Joomla 4.x an upgrade is required. 3rd party extensions need to be updated to the latest versions. Some extensions are not compatible with Joomla 4. Sometimes small changes are needed, especially to outdated extensions and template changes. Joomla 3.10.x will be supported with patches until August 2022 and with security updates until August 2023.
Besides the Joomla software extensions are often used in Joomla websites. Such a 3rd party extensions are sometimes difficult to migrate. Or they are not available for new Joomla versions. db8 can assist in the migration to newer versions of Joomla.
Switch to Joomla
Do you want to change to Joomla? Existing websites can be migrated to a Joomla website in different ways. Sometimes it is possible to migrate an existing website at database level. Sometimes it is a matter of manual copy + paste. And in other cases it can be automated.
The choice depends on the availability of a database and the number of articles that need to be transferred. db8 has had experience with companies switching to Joomla since 2005, through migrations from other systems to Joomla.
Migration at database level
If the current website was built with a CMS and the content of the website is displayed on the pages from a database, then the best way to migrate the content of the website is via database queries to a database structure that can be used by Joomla CMS.
Manually copy and paste
For small websites with up to 15 pages, the easiest way to transfer the website to Joomla is just to copy and paste the texts through the browser and place them as articles in the new Joomla website.
Automated cut and paste
For larger websites with at least 15 pages, it may be faster to write a script that converts the content of the website into database records that can be used by Joomla CMS.
To switch from Joomla 2.5 to Joomla 3.x requires an update. Joomla 1.6 and 1.7 can be updated via Joomla 5.2.28 to Joomla 3.x. Sometimes there are small adjustments necessary, particularly legacy extensions and template adjustments. Joomla 5.2.28 is the latest version in the Joomla 2.5 series. This version is no longer supported since December 31, 2014 with (security) patches.
The program code and database structure of Joomla 1.5 is so different that you can only to update to Joomla 3 via a migration. Older versions of Joomla usually keep working for a long time, provided that the party hosting the server software (PHP) do not upgrade to newer versions. For safety reasons it is advisable to keep all software up to date. Joomla 1.5.26 is the latest version and is no longer supported with (security) patches since September 2012.
Joomla 1.0 was released in 2005. Joomla 1.0.15 is the latest version, and is no longer officially supported by Joomla since July 22, 2009.