For me the main reason to upgrade would be Magsafe. I'm constantly afraid of someone stumbling on the cable and destroying the USB-C port.

I couldn't find any info on this, is this the same Magsafe as the 2015 devices, i.e. can I use existing old chargers? If so then I might even consider upgrading just due to this (I also have a 12/24V Magsafe charger).

24 GB RAM would be nice compared to 16 GB currently, but it's not something I'd really need.