No. betterC is terrible and limits you with no real benefit outside the first few minutes of playing with it. I wish they'd stop advertising it; real D is better in every way. (you can use regular classes with real D with minimal runtime too:
http://dpldocs.info/this-week-in-d/Blog.Posted_2020_07_27.ht... and the new trait the parent link talks about means no more mangle hack like I did last year which also will help it work cross compiler).
betterC just plain disables a bunch of features. With real D, you can start with an empty runtime then enable stuff as you want it.
...or frankly just use the standard runtime and find joy.