I think you mean the standard for professionals. And it was not Betamax but Betacam that was an overwhelming standard for professionals because it qualified as broadcast quality.
But Betacam was also made by Sony, and used similar technologies to Betamax, but they were no compatible.
I am not aware that any of the DVCPRO formats were ever a similar major standard for professionals.
I think you mean the standard for professionals. And it was not Betamax but Betacam that was an overwhelming standard for professionals because it qualified as broadcast quality.
But Betacam was also made by Sony, and used similar technologies to Betamax, but they were no compatible.
I am not aware that any of the DVCPRO formats were ever a similar major standard for professionals.