With V2 we’ve also rolled out new post-cure recommendations. The UV post-cure + additional thermal post-cure is the best method we’ve found to get to the maximum HDT for a material and for more consistent results. We believe this method is also beneficial for V1.
We found, that the HDT of parts in the field printed in V1 was quite variable in reality than with the reported technical data. What we do want to communicate is that HDT and elongation are sort of ying and yang. Depending on your operating temperature, and what sort of forces your part is under, you may want to play with post-cure time to find the right approach for your particular application. We can imagine some scenarios like @fantasy2 's example where you might do less of a post-cure to get good enough HDT to benefit from more robust parts.