If you haven't already come across Svelte, it's a new web framework/compiler that's gaining attention due to it's radically new -yet simple- approach to handling front-end data changes.
Angular, React, and their popularity
Angular is backed by Google, while React is backed by Facebook. While they provide really great tools in app development with a lot of ground-breaking usability approaches and some inspired behind-the-scenes engineering, I see the major reason for their current popularity as the reputation of their parent companies and the extensive marketing done by them.
I believe it's hard to deny how much Svelte changes the game from a technical point of view. It solves some of the largest baggage that comes with the big frameworks: performance, delivery size, complex reactivity, and less boilerplate.
The way Svelte solves these issues is extremely simple and elegant: Whereas traditional frameworks [...] do the bulk of their work in the browser, Svelte shifts that work into a compile step that happens when you build your app.
That's it. To read more about how Svelte is truly "reactive", read this article by Ovie Okeh on LogRocket.
Perks of being a compiler
Why Svelte is David to the two big Goliaths
(Is it Goliaths? or Goliathes? Golii?) Svelte is getting a lot of recognition and generating interest among the front-end developer community. But the adoption rate is still relatively low, as expected of any newcomer front-end technology. It happened before, as seen with Vue, and will happen in the future too. However, Svelte's background is not the same as that of Vue's, at least not yet, in terms of "backing", or "killer projects" that really exposed it to the world. Svelte was mostly developed somewhat "under the radar", and the world only really started to see its impact by the release of version 3, which made a lot of visible and effective improvements. My observation has been that a lot of experienced engineers are really excited about Svelte and have begun using it for new projects whenever they have control over the choice of technology. It's a good trend because of the knowledge and experience of these people that solidifies the trust in anyone observing this. No matter the apparent advantages in developer happiness, lower cognitive overload as well as tangible advantages like time to market and performance, enterprise customers and new-comer developers are yet to discover Svelte's beauty. Enterprises are yet to find an incentive to use a technology without it being time-tested, backed and supported by other enterprises. This is not a problem for Angular and React due to their high-profit parent companies. On the other hand, new developers tend to go for the most popular technologies. Their incentive is the position of that technology in the job market and its stability.
So, what'll happen?
I don't think Svelte is just another hype. It may not fit all kinds of requirements other big frameworks help solve, but it seems to be very good at solving issues in the simplest and most elegant-yet-obvious ways, at the same time being as less intrusive as possible. I'm quite optimistic about Svelte's future. I believe it will be much more popular in the future. While it's hard to say if it would beat any of the big two: they may have a lot of problems, but the amount of professional fixes and updates, as well as the community support is very hard to beat without the backing of a successful company. I don't think Svelte will always be what it is today. It probably will head in new and exciting directions that we never thought of; because innovation is in its blood.