The project we are working on is based on Hybris 5.7 with B2C accelerator. The codebase contains 10+ custom extensions and 5+ custom add-ons. (As the result of more than 2 years of development.)
Our client would like us to look into the implications of a potential upgrade to the latest Hybris e-commerce version possible. My question is which way should we follow? Should we start the migration steps (starting with 5.7 to 6.0) or should we rewrite the whole functionality on Hybris 6.7? Which is more recommended, upgrading or rewriting?
Has anyone ever tried to and succeeded in an upgrade like this?
Any advice (or even just sharing the experiences) would be appreciated,