I haven't seen that many posts that go into detail on this, however these are the two most popular options among internal nails.

It seems like an obvious decision to me when not considering money and the inconveniences associated with manual clicking vs magnetic.

All of the benefits of a weight-bearing nail (significantly faster recovery during/post-consolidation, better rehab, more self sufficiency during lengthening).

Am I missing something here? What's the catch? Some people suggest nail reversal being an issue, but non-union risk doesn't seem to be great with the femur, especially with younger patients.