Private aircraft are much more dangerous than commercial aircraft because of

* Multiple engines.
* De-icing equipment.
* Crew experience (probably the biggest factor).
* Support system and rules (commercial planes usually fly IFR, etc).

It is also a lot of work to study weather and plan your route rather than to sit in a lounge and wait for your boarding group. Commercial aircraft get you there much faster too since they fly higher and have bigger engines. The danger, amount of work, cost, and slowness of private aircraft is why I stopped flying. Leave it up to the professionals.

Yes. I'd believe it a lot more if they had some documentation but with the web site so incredibly broken, the veracity of their claims is in doubt.

The MOST important reason for using Postgres is that it has object ids (OIDs). This allows true referential integrity. You can have a row point at another row and this reference stays the same REGARDLESS of whether you change the primary key of the referenced row. This allows true object orientation.