I think it unlikely that 600 pilots would be laid off.
However, Ryanair are unhedged (it's for gardeners according to O'Leary) and the oil price is stubbornly high. This winter will be bad for everyone, but for those unhedged, if the oil price stays high, it will be AWFUL.
You can't buck a fact, but you can buck a trend. This hiigh oil price is a FACT, it's here to stay at higher levels than we are used to.
The trick is for FR to find a way of keeping us flying. And with us all feeling the pinch, that could be tough.