dhh says 37signal's apps for Hey (their email platform moving to native)
backend for their email platform is now Rust - written by agents
says Rust produces small binaries - cutting number of servers needed from 110 to 10. hell they could serve peak traffic on a Raspberry Pi
says now that agents write all the code - use faster / native languages.
rails or ruby hardly get a mention besides that they might be well placed to capture web apps written by agents.
(disclaimer: I'm a CEO of HTMX)
Keep in mind DHH is working on an email app, it makes sense he sees native as the default option for that over pushing everything through the web when the barrier to entry lowered dramatically.
Hotwire is not explicitly a cross-platform concept. It's primarily a way to build web apps in the browser which is not going away any time soon. The only difference is in 2026 you're just more likely to vibecode a native mobile app than build a web/React Native version. Likewise you may build a native Desktop version instead of an Electron wrapper.
So even if we can generate an app easily now, is that a wise choice for every business?
Same with server side rust. A high volume transactional backend email service makes sense there. The base layer of a CRM managing a lot of business logic?
Life will go on much the same. We just have more options to say yes to 'native' with LLMs, we can experiment more with ideal scenarios rather than a religious adherence to cross platform or single-framework merely for team DX simplicity.
The web makes apps worse by forcing a fairly strict sandbox, even as Google keeps trying to loosen it. Think of a messaging app that hides in your notification tray, that's a trivial UX thing that's impossible on the web.
Server side rendering makes sense for mostly static content, but for web applications, a front end framework and a back-end API are a much better match.