Well if you guys are not motivated by cost, why go through the faff of charging them every night to save a few quid.
Convenience. Plug in when you get home, ignore the car overnight and it’s charged up ready for another day with no real hassle. The car would be parked there anyway, why not just plug it in and ensure it’s at your set limit. Most people will set the max charge to 80-90% unless going somewhere further away, so it may not actually take much charge each night.
I'm Autistic, if I say something you find offensive, please let me know, I can guarantee it was unintentional.
I'll try to give my honest opinion but am always open to learning.
Mark