Indeed, if VCS is not your core biz, go with whatever you know well and feel comfortable with (for instance, disaster recovery and solving uncommon problems). B

Indeed, if VCS is not your core biz, go with whatever you know well and feel comfortable with (for instance, disaster recovery and solving uncommon problems). Briefly consider the ease of on boarding of new employees, and whether your own skills are good enough to teach it to them if your preferred system is not one that can be expected of people to know.