Are there examples of languages completely shifting from (vocalic) release of all coda stops to, say, nasal release?
I imagine substrate effects could account for some of these cases (cf. unreleased stops in Indo-Aryan Chakma, possible Tibeto-Burman influence?), but am wondering if any language has undergone an independent shift towards a new release type.
The English glottalization to a great extent could be seen as independent, but are there examples of a coda-releasing language shifting to, for example, a Mon-Khmer-type unreleased system? I'm particularly interested in the shift to nasal release. I have possible examples from Munda (where all coda stops are underlyingly voiced, nasally released in languages like Mundari and Ho) and some sociolects of Sinhala.