The Seductive Promise of Raw Speed
The first thing proponents of Solid.js will tell you about is its staggering performance. Benchmarks consistently show it running neck-and-neck with vanilla JavaScript, often leaving established frameworks like React in the dust. This speed isn't magic;
it comes from a fundamentally different architectural choice. Solid.js completely ditches the Virtual DOM (VDOM), the abstraction layer that React uses to figure out what to update on a page. Instead of creating a virtual copy of the user interface and comparing it to find changes, Solid compiles your code into direct, surgical DOM updates. For engineers tired of optimizing React apps with `useMemo` and `useCallback` to prevent unnecessary re-renders, this sounds like a dream come true. The promise is simple: write your code, and the framework will update the screen with maximum efficiency, no questions asked.
A Deep Philosophical Divide
Herein lies the crux of the debate, and the real reason for the love-or-hate dynamic. The performance gains come from a concept called fine-grained reactivity. In React, the mental model is that when state changes, the entire component function re-runs to produce a new UI description. Solid.js is the polar opposite. A component function runs only once, to set things up. State is held in special reactive primitives called "signals." When a signal's value changes, it doesn't re-run the component; it directly updates only the tiny piece of the DOM that depends on it. This is where senior engineers split. Those who love it see an elegant, efficient system. Those who are skeptical see hidden complexity. Because the JSX syntax looks so similar to React's, developers can be lulled into a false sense of familiarity, only to be confused when their old habits don't work. It requires unlearning the React mindset, which for a developer with a decade of experience, is a tall order.
The 'Love' Camp: Performance Pragmatists
Engineers who fall in love with Solid.js are often those who feel React has become burdened by its own solutions. They see the VDOM not as a helpful abstraction, but as unnecessary overhead. For them, Solid's signals aren't magic; they're a more explicit and honest way to handle state. You are consciously creating a reactive data graph, and the UI is simply a visual representation of that graph. This group appreciates that Solid lets them get closer to the metal of the web platform while maintaining a declarative, component-based structure. In many ways, they feel it's the framework they always wanted React to be: fast by default and free from complex re-rendering rules. They see it as an evolution, shedding the parts of the modern front-end stack that have proven to be cumbersome.
The 'Hate' Camp: Ecosystem Loyalists
On the other side are the pragmatists of a different sort: those who prioritize stability, community, and a massive ecosystem. For them, Solid.js is a solution in search of a problem that most teams don't actually have. They argue that while React might be slower in micro-benchmarks, its ecosystem is an undeniable juggernaut. Need a component library, a state manager, or an animation tool? For React, there are dozens of battle-tested options. For Solid, the options are fewer and less mature. Furthermore, hiring is a major concern. Finding a team of senior engineers fluent in Solid is far more difficult than finding React developers. For these engineers, the proven reliability and immense resource pool of the React ecosystem far outweigh the raw performance benefits of a newer, more niche technology. Switching an entire team or company to a different paradigm is a massive risk, and for many, Solid's advantages don't yet justify it.
