There are numerous synonyms one can use in place of "based on past experience." A few options include "founded on prior knowledge," "built on previous encounters," "informed by past understanding," "drawn from past occurrence," and "stemming from prior encounters." Each of these phrases captures the idea that what we currently know and understand is influenced by the experiences we've had in the past, whether in personal or professional realms. In any context where one wishes to convey the idea that something has been shaped by prior experience, any of these synonyms could be a useful alternative.