Advanced Financial Closing S/4HANA release level

Hello Team.

OSS note 2873915 mentions that relevant technical options for connecting SAP AFC to an SAP S/4HANA system are available with SAP S/4HANA 1809 Support Package 4. But it is also mentioned that . Note that these are the minimum release levels and that we recommend a current support package or SAP S/4HANA release. So from that perspective, what is advice to customer who is contemplating implementing AFC and is on 1809 SP4 level. Which release version he should upgrade to ? What challenges can be expected if the customer decides to implement AFC with minumum support version of 1809 SP4 ?

Looking forward to insights and recommendations.

Thanks & Regards

Amit Kulkarni