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English perfect encodes current relevance, whereas the progressive profiles temporariness/process; aspect choices interact with genre and stance (cf. Comrie; Biber). Pick the best option.
Present perfect signals present relevance; progressive profiles ongoingness/process.
Perfect and progressive are interchangeable in evidential reporting.
Progressive is prohibited with stative predicates in all varieties.
Present perfect always requires an explicit time adverbial.
Perfect is a tense with no aspectual implications.