It's heartbreaking to lose plants, John. I sympathise.
I've never lost cerastium and I've had it in the garden for many years (one of my favourites!)
Ive grown a few Ceanothus. One lasted a few years among other shrubs, but like yours, it upped and died
a great pity as it was six ft high and wide and a great show each year.
I don't have them any more.
I have a Euryops in a pot, survived! Mind you, I'ts a replacement for my original bought at a plant sale in a location by the sea so it was used to milder climates. nice plant!
Will you replace like for like or choose new plants?