Druid as it exists today is not a great fit for what you're trying to do, as drawing on mac is all based on Core Graphics and Core Text. GPU-based drawing is the future, and we're working on that (piet-gpu), but it's not yet in a really usable state.
In any case, hope this goes well. It's clear to me that Rust-based UI is the most viable path to an Electron alternative in the future, and the more evidence we have for that, the better.
You'd exactly right that's why we didn't pick Druid--we needed something that rendered on the GPU. We actually talk more about this decision in our "How Warp Works" blog post here: https://blog.warp.dev/how-warp-works/
Developing in the open would make it easier to trust that you're not doing something nefarious. When I think about the kind of data that goes through my terminal on a day-to-day basis, I have to _know_ for sure that my terminal can be trusted. That makes Warp a non-starter for me until it's open source, which is really a shame because it looks fantastic.
Your plan should have been to wait until something was downloadable before you announced it.
Anything useful you produce will be community-maintained eventually, and your cloud product will vanish once you complete your amazing journey; anything in-between seems like rent-seeking. Meanwhile, your competitors are Free Software and can out-develop you.
We are particularly excited about sharing our Rust UI framework since there aren't a lot of great options for building native UIs in Rust right now. We want to make it cross-platform first though.