No, it's certainly not about dedication. 
Tumult did the work with Hype 4. It can be great for making games.
Here's the key part...
The key word is browser.
The question wasn't... "What's the best for making HTML5 games?" ...which is a highly debatable topic. As an example, I moved away from GameSalad. If I was to create a game from scratch today, I'd easily pick Hype over GameSalad or Stencyl. I like both those apps, they're great for education, but I personally prefer the way Hype works.
Other game development tools can be fine.
Otherwise, we wouldn't have games like Hobo With a Shotgun. 
Are there better alternatives, that's not the main question here. If it was, then we'd get into topics of... Do you want to rent software? ...Do you want the cost of the software to change based on your revenue? ...How do you feel about metrics gathering?
Hype isn't a rental, it doesn't put any strings on my games (no earning caps, no splash screens) and it doesn't phone home. Those are HUGE and IMPORTANT features of Hype. I've been doing this for many years. I've never seen anything like I've seen from Tumult – not on this level. They listen to feedback, they get the work done and they don't lo-jack their software. Their design/development decisions are very good too... logical... clean... generally lightweight... Hype matches my style. It works the way I work.
Here's a nice site... https://html5gameengine.com ...lots of options for HTML5 game development. I suppose if Hype wasn't around, and I was looking to make a 2D web/app game, Phaser looks interesting. I liked Stencyl too. Looks like they're 4.0 too... http://www.stencyl.com/features/whatsnew/
But again, as I interpreted the question, the question isn't about the best. The question is if you can make games with Hype. Yes... you absolutely can and it is amazing. It's certainly not the most intuitive thing ever, but I feel it's similar in difficulty to Flash/ActionScript. I did write this... While there are limits ...and... No, that would be a lot of custom JavasScript ...so I didn't sugarcoat it. (I even left the typo in for historic accuracy. HA HA!) I'm not being a fanboy here. Yeah, I like Hype... but I like it because it's good.
Sure, performance is a concern... that's typically a concern with game development. But when you look at some of the features... sprite sheets, vector graphics, Physics API, scene editor, HTML / Data attributes ...that makes game development possible.
It's like I said in the review...
I don’t think we’ve fully realized how powerful this update has become.
I'm actually surprised by your response, but it shows that the statement is more true than I imagined. There's a lot of talented people here. You're one of them. Yet, we haven't really seen a Hype gaming explosion. Maybe that's what I need to focus on. The world doesn't know about the hidden power of Hype. The latest update is good. If it wasn't, I wouldn't be here. I wouldn't be thinking about making games with Hype.
But hey, Tumult appreciates feedback. Why wouldn't you make a web game with Hype? What's missing? Clearly something must be wrong. Otherwise, more people would do it... no?
Ah, I think you're taking about character spawning, no?
Ah, perhaps that's why I like Hype. Heh, I've been adding particle effects to my games manually. I just used pure JavaScript to keep the code light weight. Examples are title screen of Circles with Grandma and the stars in the background of Annoyed Tomatoes... Annoyed Tomatoes – Photics.com
I suppose one could argue, "Mike, if Hype is so great at making games, why do you have so many unfinished game projects?" I didn't finish B.R.O.O.M. or Annoyed Tomatoes (Hype version) and I didn't even get started on Picopede. (Well... picopede ...I suppose that counts as a start.) The answer is supply and demand. There are so many games out there. So many of them are free. I don't think my games are good enough to compete. So, I focus my limited time elsewhere.
Basically, I'm struggling with this... You Can't Be Half an Entrepreneur ...seven years later, that article hit me hard. Because I'm not doing game development full time, my games can easily be beaten by a game from a full-time developer... or a game from team of people working full-time.
And in general, I don't play or buy games as much as I used to. Games are an art form. You need to be passionate about it. The players can feel the difference. I am passionate about "Widgets", and I'm really enjoying it. Unfortunately, I couldn't build that with Hype. It doesn't have Flexbox support. So, I am aware of the limits of Hype. But if I do get around to finishing more game projects, it's looking like those games will be built with Hype.