Bootstrap 4 is now out of Beta and stable v4.0.0. Learn more
I recommend keeping track of the project milestones to gauge the progress.
As of 5/24/2017 the Beta is 92% complete.
You can drill down to see what is still needed to be completed in the ship list. You could even help out if you are able.
Patience is the secret to good food. Gail Simmons
We have to wait for the cooks to finish cooking.
The longer we wait the better the finished product.