TL;DR: I think that working less and setting time boundaries forces you to make better decisions and fulfill the higher purpose of achieving more.
Would you agree that constraining yourself is actually productive?
Sometimes it's easy to lose track of time and have deadlines get you caught off-guard. Especially when you have some vacations planned. You're like "pfft, there's plenty of time…" and then the invitable "oh, shit" moment comes.
The idea behind this tool is to give you a concrete, visual view of exactly how many workdays and workhours you have. It also allows you to mark your vacations, so you can know how much time you really have. On top of that, you can add your goals and the estimated time you think they'd take in order to get a rough estimation of how they fit in.
Apart from tracking quarters, you can configure it to track any period of time, in case you follow some different parttern. I hope you find it useful!
But I think something's missing from it — the simple act of consistent self-reflection on what you're doing and why. Cultivating this habit is what I call a "metasystem." What do you think about this idea? Does it make sense? How could it be better?
TL;DR: Picked React because it's the biggest and most stable cult, but you should experiment with other cults as well because it's about the ideas, not the specific frameworks.
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Hope this can help someone out there who is also pulling the lever of the framework roulette and has to make a decision.