It will be easy to break in time. Eventually you'll just be able to use a tool that shines a laser at the right bit and breaks the rate limiting. We've already

It will be easy to break in time. Eventually you'll just be able to use a tool that shines a laser at the right bit and breaks the rate limiting. We've already seen similar attacks on hardware wallets previously thought invulnerable. I don't think any cryptography has stood the test of time. It's unlikely anything today will survive post-quantum.