I, bald head and stubble carrier, on the lookout for a successor device (had a small choice).
I (not with a knife) shave my head and neck with it every day should provide 0.1mm successor.
Benefits:
1. beard trimmer from WAHL creates the promised 0.1mm
2. Ladezet is only about 1 hour!
3. the battery Laufzei is about a week, depending on the application
4. a large and a small steel tower, both 0.1mm
For my purposes, the beard trimmer of choice is the 1st choice for me.
