I've not used Solid much so I can't say, but my point is that if your app is rerendering unexpectedly that's because you haven't spend the time to think about t

I've not used Solid much so I can't say, but my point is that if your app is rerendering unexpectedly that's because you haven't spend the time to think about the data flow around your app. It's possible, and not that hard even in a large app, to build things so that this doesn't happen. Signals sound like a way of avoiding updates, and if the experience of using them is elegant or if the performance is better that's awesome, but you definitely can build apps without them and never see the problem they solve.