[raggi]

It's less mature, which shows up in lots of places, such as sometimes having less than ideal defaults (as in buffer sizes shown here), and bugs if you start using more fancy features (which improve over time of course).

This is approximately the case for any alternative IP stack you might pick though, a mature IP stack is a huge undertaking with all the many flavors of enhancements to IP and particularly TCP over the years, the high variance in platform behaviors and configurations and so on.

In general you should only take on a dependency of a lesser-used IP stack if you're willing to retain or train IP experts in house over the long haul, because as is demonstrated here, taking on such a dependency means eventually you'll find a business need for that expertise. If that's way outside of your budget or wheelhouse, it might be worth skipping.