Probably the best example I can think of is Diane Duane reworking her Wizards series to make it modern-day, but there are others, including owners of a literary estate altering books left to them to make them compatible with current standards.
What do you think? Does it matter if it’s the original author or an inheritor?
Don’t care. I think people who pretend to care that aren’t aware about the long history of books being updated look ignorant. Tolkien rewrote parts of The Hobbit, Dahl updated his books to avoid offensive stereotypes.