What is the current use of Plural vs. Singular second person when addressing to parents?

[bytebuster]

Q: What is the current use of Plural vs. Singular second person when addressing to parents?

In many classic books, I see addressing parents by plural of nobility (Ukr: Пошанна множина), most probably as a sign of respect and dignity:

— Ви, тату, говорите до мене, наче до маленької, – сказала Марта, осміхнувшись.
(Іван Нечуй-Левицький, «Хмари»)

What is the current, actual amount of usage for this construct in modern Ukrainian?

---

Further reading:

• Pluralis majestatis
• Вживання особових займенників