[blowski]

What if he doesn’t care about the “best it can be” because his product is already so widely used? What if he thinks “my product might be a little worse, but I’ll feel a little better”.

I agree that he’d be under an ethical obligation to listen to a rude security report. But it doesn’t follow that he must therefore listen to all rude bug reports.

[teddyh]

As a user of some software, I would certainly hope that the developers would prioritize fixing bugs over their own egos.

[skeeter2020]

As a user of free software you can hope all you want, but you have no right to an expectation that this is the priority. Your right end with the decision to stop using the software, which is exactly what Don said to the original email

[blowski]

Well if the developer does choose to prioritise their ego, you can always get a refund.