I must have misunderstood. I was under the impression you could use your own self-hosted as an always-on signer to alleviate. I haven't been able to dig into it since seeing this.

https://primal.net/e/note1xw04kjsq2cnay0xua7l5cnqgu9qkfnun4npmw54tyy68v8kr2wuq4x6jq8 

 You can run a self-hosted version of nsec.app with Docker to make sure your keys are always online.