You might like reading "What drove Europe to explore after the fall of Constantinople?" at https://www.reddit.com/r/AskHistorians/comments/8des7y/what_drove_europe_to_explore_after_the_fall_of/
/u/wowbuggertheinfinite replied. /u/terminus-trantor briefly replied and linked to some of their previous replies on the subject.
Mentioning previous replies is not to discourage further discussion. More questions, data, and debate are welcome.