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?
An artist is the artist and they can do what they want with their work. “Art is never finished, only abandoned.”
That said, it rarely interests me to do such a thing and I wouldn’t read it in most cases.