It's always a cost/benefit evaluation. When the costs stay roughly constant, the outcome is usually to use the same stuff as for previous projects. But when the vendor significantly increases the costs, like Oracle does in the recent past, that may have significant impact. It may be easier/cheaper to switch to a different database, for example.

I'm not saying all companies will end up doing that, but some certainly will (and already do). They may not be vocal about it, though, because they don't want to piss Oracle.