Official recommendation from coinkite is that HWWs should be replaced every 2-3 years IIRC.
Discussion
Contrary to the influencers
The article everyone is a scammer by Bitstein comes to mind in regards to coinkite. Seedsigner is not trying to sell you anything, free and open source that anyone can assamble from multiple sources.
Well that's the manufacturer recommendation. But it's like a dealership, you really should get that oil changed more frequently.
You’re wasting so many sats thinking of a hardware signing device like oil in a car. It’s more like a keyboard
All analogies eventually break down but I think a pen makes a good analog for a signer. It documents/conveys info and can generate signatures, but when passed from user to user it doesn't retain info about what the last user did.