During my twenty years with Postgres, I knew the day would come when proprietary databases could no longer ignore Postgres and would start attacking us.
Well, that day has come, at least in Russia. During the past few weeks, Oracle sent a letter (Russian, English translation) to Russian partners and customers comparing Oracle favorably to Postgres as a way of cirumventing a new law favoring Russian-produced software. This is the first direct attack I have seen on Postgres, and is probably representative of the kinds of attacks we will see from other vendors and in other countries in the years to come.
The press has picked up on the news (Russian, English) and given balanced coverage. Comments on the English article were, in general, positive — I particularly liked this one. There are two Hacker News threads about it (1, 2), a community thread about it, and another community thread about Oracle RAC.