In some fields research can’t be replicated later. Much of all autism research will NEVER be replicated because the population of those considered autistic is not stable over time.
Other research proves impossible to replicate because whatever experiment was not described in enough detail to actually replicate it, which should be grounds to immediately dismiss the research before publishing, but which can’t truly be caught if you don’t actually try to reproduce.
Finally these practical concerns don’t even touch on the biggest benefit of reproduction as standard which is that almost nobody wants to reproduce research as they are not rewarded for doing so. This would give somebody, namely those who want to publish something, a strong impetus to get that reproduction done which wouldn’t otherwise exist.
Other research proves impossible to replicate because whatever experiment was not described in enough detail to actually replicate it, which should be grounds to immediately dismiss the research before publishing, but which can’t truly be caught if you don’t actually try to reproduce.
Finally these practical concerns don’t even touch on the biggest benefit of reproduction as standard which is that almost nobody wants to reproduce research as they are not rewarded for doing so. This would give somebody, namely those who want to publish something, a strong impetus to get that reproduction done which wouldn’t otherwise exist.