[hedgehog]

I'm not sure what you're responding to. What I'm describing is my actual experience using Claude, and what I'm hoping for is that they'll spend something like two engineers for a quarter making the app more pleasant to use.

Setting that aside, I think you learned the wrong lesson here. There's no fight. Performance comes from app architecture engineering more than the underlying tools. Building on the trash fire that is the current JS ecosystem may make it harder, true, but apps like VS Code, Discord, Slack, etc show that with enough effort a team can use those tools to deliver something with relatively much better performance. The underlying browser engines are quite sophisticated and very efficient for what they are asked to do, it's just a question of good engineering on top of that. Based on the observable behavior I'm guessing the Claude app is doing something like triggering reflow for the entire chat thread every time they append a few characters to the chat. Totally avoidable.

The big reason web tech is ubiquitous is it has the best properties for distribution. That may last a little while or a long time, but there is no fundamental reason why it's more durable than say Win32 and MFC.