As a rule of thumb, take 80% of an ERP system as is adopt max. 20%. If said edge cases are truely your competitive advantage by all means get them working in yo

As a rule of thumb, take 80% of an ERP system as is adopt max. 20%. If said edge cases are truely your competitive advantage by all means get them working in your ERP system. More often than not, people consider edge cases competitive advantages when they usually are just legacy stuff that doesn't really matter.