My electronics problems were really random. This was on a '13 G550, owned from new... You would turn the key off and the truck would continue to run. You would lock the truck and then come back to the COMAND system on. Random crap like that.
The Distronic system failed. Which made the dash light up like crazy. No choice but to repair, post warranty. $$$$$$$
Owned it for five years. I think it had twenty something K miles at the end. Bought it for her, but she refused to drive it. And for me, it wasn't the kind of vehicle you can go meet clients in, so I basically used it for errands.
Got super lucky when MB refreshed the G in 2018, because the earlier M273 V8 trucks spiked up in value.
I'd be curious how many former G owners would ever consider getting another one. I'm solidly in the NFW camp.