My question is about coins that have changed their algorithm midstream, they had one and then changed.
Not necessarily from POW to POS,  but from one type of POW to another.
In the case of the neoscrypt, that is of interest because of the varying block times.

Changing the algo programatically seems easy, but coordinating with Hodlers and mining pools seems a huge issue. Unless it is not.
Trying to find out.