I haven't had the time to review this entire thread,
however I have certainly had my share of deceased plants over the years.
For me, this thread has served as a reminder,
that when we come across a naturally growing stand of CP's out in the wild,
that we should leave them undisturbed.
Other than the rare occurrences when a site is indeed in jeopardy and the plants need relocation,
plants are better off left where they are and allowed to live out their lives as nature intended.
There are more than enough plants available at affordable prices or for trade, so that there is no real need for the average person to be field collecting for their own benefit.
In general, nature can handle giving plants the environment they need far better than any of us can.
Nature is not "busy" with other things like work or school or distracted to where it forgets to water or give the plants the right amount of light.
We all lose plants.... for whatever reason. So the next time you see a field of sundew or Sarrs in the local bog or while on vacation, enjoy them, then leave them for others to enjoy... or at least leave them so that their progeny may someday help to populate the natural stands in the future.
I have lived long enough to see many natural stands of plants killed off, by selfish land use, draining of wetlands and poaching. Our natural environment needs all the plants it has, if there are to be natural CP sites in the future.
So unless you know for sure that a group of plants are in danger because of negative environmental changes, leave them be. For as this thread shows, our taking plants in to our own care does not necessary mean their survival. Far from it!
Cultivated plants are propagated for us to grow (or kill). So it is best for the CP's that we love to stick with those, and leave the natural ones to grow wild... as nature intended.
Good luck all.