I’m not a Bubble tutor, nor am beholden to Bubble in any way. I have looked at a number of no-code tools, and here’s the simple truth: there is no platform that lets you easily build a front-end, back-end, DB, use no code, cost less than $100 a month, and that is lightning fast for 10,000 users, regardless of the complexity of your app. Each platform has one or more of these features, and there is none that has all these.
There are two distinct axes: 1) ease of making a website, and 2) scalability and performance. They are completely unrelated.
For axis (1), perform a simple exercise: look at the tutorials, forums, and YouTube videos for each platform (Wappler, Bubble, AppGyver, WebFlow, Carrd, whatever you want). As a very simple example, look at Bubble’s how-to for creating an Instagram or Facebook clone. Then look at Wappler’s tutorial for making a social media website. And the other platforms. Depending on your skill set, experience, and mental make up, you will know what’s right for you for axis (1)
For axes (2), go to each platform’s forum and see what people complain about. Also try to find a few sites made on each and evaluate.
If you are amateur, and this is one of your first few websites, the reality is that you will have a few users on day one, a few more users the next week and so on. Everyone dreams of being the next Instagram, but it is unlikely.
Use a platform that lets you evaluate different features, lets you build and rebuild fast, debug fast, add user-requested features quickly, and so on.
I think all of these discussions are to some extent like people arguing about Toyota vs Mercedes vs Ferrari.