It's just the first alpha, so it's still a long way to go before the final version. In the meantime, we can learn new features, like:
Responsive font sizes
In Bootstrap 5, we’ve enabled responsive font sizes by default, allowing text to scale more naturally across device and viewport sizes. Have a look at the RFS page to find out how this works.
If @martin decides to charge an additional license for bootstrap 5 support I'm in. But only if I get multimonitor support too.