Building and sharing an app should be as easy as creating and sharing a video.

Sorry you’re surprised. Issues are filed at about a rate of 1 per day against GLib. Merge requests at a rate of about 1 per 2 days. Each issue or merge request takes a minimum of about 30 minutes (across at least 2 people) to analyse, put together a fix, test it, review it, fix it, review it and merge it. I’d estimate the average is closer to 3 hours than 30 minutes. Even at the fastest rate, it would take 3 working months to clear the backlog of ~1000 issues. I get a small proportion of my working time to spend on GLib (not full time).

While Trailblazer offers you abstraction layers for all aspects of Ruby On Rails, it does not missionize you. Wherever you want, you may fall back to the "Rails Way" with fat models, monolithic controllers, global helpers, etc. This is not a bad thing, but allows you to step-wise introduce Trailblazer's encapsulation in your app without having to rewrite it.

While the very same software might be in a PPA and a snap, the fact that the snap is shown in Ubuntu Software is the point I’m making. Many people use that to install software. So making software appear there is beneficial for developers - their software is found, and beneficial for users - they discover new software.

The benefits for developers do reflect on benefits for users, with more software delivered faster and more securely.

We are unapologetic tinkerers who neither invent the wheel, nor are satisfied with the wheels already at our disposal. The best scholarship and the best pedagogy take the best of what already exists and make it better, at least better for the task at hand. We need to embrace this identity as hackers, acknowledge our indebtedness to those who have gone before us, forsake the illusion that we are creating (can create, should create) something wholly original, but also refuse to take for granted the things that have been passed down to us.

I have no familiarity with Svelte internals, so much of your talk about what they would do eludes me. I'm just concerned with developer ergonomics

In general, my focus has shifted from optimization to DX. Partly because Svelte does a lot of the heavy lifting. For things that can be optimized on a need-to basis, I would rarely sacrifice DX.