I have had this talk many times and it usually went something like: "You don't realize how serious it is. We discover issue#13270 during the validation of the FCDC. If it occurs after the primary flight computer had a hardware failure and the pilot is landing with heavy side winds and the thunder strikes, there is a heightened probability of hard landing. Most dangerous aircraft ever. By the way, this weekend I'm taking an Avro RJ100 to go to Brussels; no problem there."

This sent me down a rabbit hole. The RJ100 (BAe 146) can apparently be kitted to take off and land on gravel:

https://www.aviationpros.com/aircraft/commercial-airline/pre...

So can a 737:

http://www.b737.org.uk/unpavedstripkit.htm

The 737 was originally designed for short, unpaved runways, which would bring jet service to many otherwise inaccessible airports.

Sure, the older 737s. That's why most of the 737-200s still in service are up in Canada. The high bypass engines on the NGs and newer are too big to easily fit gravel kits on.