Simple Commerce has been replaced by Cargo, the natural evolution of Simple Commerce. It takes everything you love about Simple Commerce and makes it better in every possible way. Some of the big changes include...
While Simple Commerce v8 is compatible with Statamic 6, you should consider migrating to Cargo soon, as Simple Commerce won't be updated for Statamic 7 and will stop receiving security updates at the end of January 2027. You can find more information on the migration process over on the Cargo documentation.