Fascinating quote by William Sanford La Sor, commenting 1 Kings 13.1-10 in the New Bible Commentary: Revised, D. Guthrie and J. A. Moyter, eds. (Eerdmans, 1970), p. 338:
“… the introduction of the miraculous fits the biblical pattern whereby the miraculous is part of a significant event at the beginning of a new period.”
We see the same happening in the NT. The miraculous comes at the beginning of the new covenant, the establishment of the church, and the initial preaching of the gospel to all (see esp. Acts 2 and 10). Afterwards, it tapers off and ceases. This fits in with the “biblical pattern” mentioned by La Sor.