[ins0]

That is by far not the job of a browser to remind server administrators to renew there certs and display that message to random users.

[billpg]

Alas, in this imperfect world, phone calls from random users are how server admins are notified of cert expiry.

[Piskvorrr]

...where a 10-line cron script would have done the same job, in advance.

[_ea1k]

And then the cron job (that only needs to work every few years) breaks and you find out about it after the fact when a user complains.

[Piskvorrr]

Needs to work every few years for each domain. Unless all your certificates expire at the same time (or you only have a few), this will be triggered a few times per year.

And moreover, your scenario is essentially "worst case: fall back to previous behavior." That's not too bad...

[ins0]

In this "imperfect" world nowadays eveyone try to ship his responsability to someone else.

[billpg]

I'll wait for someone else to respond to your comment.