Modifying MTU in Whonix

Is modifying the MTU in whonix okay or not recommended? Why or why not?

There are a few mentions in the forums but I didn’t check how relevant it is. Lots of it is probably not relevant.

https://forums.whonix.org/search?q=MTU

Whonix doesn’t have research / documentation on this topic. This is undocumented.

This question is not very specific to Whonix. I recommend to resolve this as per https://www.whonix.org/wiki/Free_Support_Principle by removing the Whonix specific part of your question.

Is modifying the MTU in whonix okay or not recommended? Why or why not?

Is modifying the MTU when using Tor okay or not recommended? Why or why not?