Comment by trash_cat
Granted I only travel with hand luggage, I never had any issues with cancelled or delayed flighs when booking separate tickets. Even so they are relatvely cheap. It is even cheaper if you book your return flight ticket separately.
You need to be more clear about what you meant by saying "never had issues".
The point is there might be issues because the second flight has no obligation to refund you if you're late (but they might still do out of generosity).
It's not like it's gonna happen all the time. So having data points saying that didn't happen is kinda pointless.