Some may mock but 'heavy' time can mean the difference between a candidate successfully and smoothly transitioning onto other more complex and weightier types or not quite making the grade.
An old sim instructor of mine once commented that he could tell those pilots who had flown heavy singles like 206s or 210s compared to those who had only operated light pistons such as 182s by their finesse.
In fact said same sim instructor said his most impressive student was a young Russian who had Tu-114 time!