come-along

(verb) come into being or existence, or appear on the scene. Synonyms: appear, come along. Examples: "Then the computer came along and changed our lives." "Homo sapiens appeared millions of years ago."

(verb) develop in a positive way. Synonyms: progress, come on, come along, advance, get on, get along, shape up. Examples: "He progressed well in school." "My plants are coming along." "Plans are shaping up."