Comment 9 for bug 1559408

I checked the other default disabled drivers.
To all some kind of incompleteness, non-support or being only stubs applies.

It could be said, that the same is true for the virtual ones we enable like PCAP and XEN.
But there is a major difference in:
- nobody is "buying" the HW for pcap or XEN to then realize it is not supported
- those virtual environments are good for experiments and proof of concepts but not suitable for most production cases anyway

So (keep) enabling those virtual ones is kind of ok, while I'd consider enabling the PMDs for more of the HW cards is not.

To get those enabled in my opinion one has to work with the upstream project to get it properly supported and default enabled.