Given that pretty decent flight simulators are widely available these days (even in educational institutions), I'm surprised there isn't a thesis published somewhere identifying the factors and issues.
Surely the "don't turn back" rule is initially intended to give low hours pilots (low hours in type, I mean) or low currency (in type) pilots a simple rule to follow with a decent chance of success in a very stressful situation.
We've all heard of people who've been badly hurt in a failed turn-back attempt. I've never heard of the equivalent in a land-ahead - though maybe I've not been listening hard enough.
Finally, and then I'll crawl back in my hole I promise, shouldn't glider pilots smugly comparing their every-day landings with a light aircraft forced landing really be considering for comparison a sudden and unexpected failure of theairbrakes to jammed full open? That's a much more reasonable comparison and I wonder how they'd cope
MB