> which we know you are using for your project because we gated all the features behind it

I don't think that's really fair, or at least hasn't been true for a long time now. Use of the stable channel far exceeds use of nightly according to all the surveys. At my company we've always stuck to the stable channel, and even in my own personal projects where I have no need for stability, I don't remember the last time I used a nightly feature, simply because I haven't found the need to...

I don't believe there are many cases left where you're forced to use nightly: most of the cases where people are using it is because there's a "nice to have" feature, not because that feature is actually essential. Even rocket, which was famed for using a ton of nightly features, now works on stable Rust.