Is design and UI the thing you're trying to differentiate your work on?
If not, don't worry about it, just pick a solid option (and honestly, even Bootstrap is still just fine), learn it well, including its limitations, and move forward.
When a replacement comes along that is so compelling you just have to switch, you'll know.
If design and UI is your differentiator, well, you're going to have to live with a lot more experimentation and testing, because the world of design is much more fad and fashion driven.
Comments
Is design and UI the thing you're trying to differentiate your work on?
If not, don't worry about it, just pick a solid option (and honestly, even Bootstrap is still just fine), learn it well, including its limitations, and move forward.
When a replacement comes along that is so compelling you just have to switch, you'll know.
If design and UI is your differentiator, well, you're going to have to live with a lot more experimentation and testing, because the world of design is much more fad and fashion driven.