That question isn't really applicable to this situation, since https://code.storage is the company's main product. It has a business model, customers, and revenue. The open source libraries are tangential.

Technically, it's a separate product called Deno Subhosting, not exactly Deno Deploy. (But no longer used: https://www.netlify.com/blog/edge-functions-firecracker-micr....)

To be extra clear, Netlify no longer uses Deno's managed infrastructure, but still uses the Deno runtime. (Source: I work at Netlify.)

Did they have any heads up about this, and/or do they have any roadmap for what's happening now?

If your question is whether Netlify had a heads up about Cloudflare's Deno acquisition and EOL, no, not as far as I'm aware.

Well, that is a shame, in my opinion. I trust humans significantly more, and I hope that never changes.