SAP Migration to S/4HANA Remains Slow Among Clients Only 39% of SAP’s 35,000 ECC clients have transitioned to S/4HANA since its 2015 launch, according to Gartner. Despite SAP’s efforts to promote the migration with initiatives like "RISE with SAP," customers cite challenges, including integration delays and limited support, as reasons for the sluggish adoption rate.3