C# - is it now widely used for BRs?

1) Is C# now widely used for Business Rules?

2) Is there any plan to support C# in member formulas?

3) For those who moved their business rules from vb.net to C# - why you did it and what benefits you get out of it?

4) In OneStream - is there anything that one can do in vb.net but can't in C#? If so, what are they?

Thanks in advance for sharing your experience.