Hi Mark,
BPM 8.6 applications are supported by IBM BAW but migrations are always tricky. You need to consider many things before planning migration and it won't be easy to answer your question in few lines. Through analysis, estimation and planning are required before migration. Migration planning and approach will vary greatly if you are upgrading the existing system, migrating to an on-prem BAW environment or migrating to BAW on Cloud.
Our company is helping multiple customers with similar needs. That does not mean you cannot do it yourself - you need to analyze the applications thoroughly for deprecated artifacts, compatibility of existing data on new environment, reporting(performance data warehouse) compatibility etc. and plan the migration accordingly.
Thanks!
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Atanu Roy
Solution Architect
Salient Process
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