https://www.ic3.gov/Media/PDF/AnnualReport/2020_IC3Report.pdf
This isn’t really an age thing, if you look at stats. Yes, the older age groups both have more victims and larger losses than younger people. But the victim count isn’t so much lower that you can just brush it off as people being senile. Or are all the gen x and millennial victims senile too?
A lot of scams can fall into one of two categories. Scare people and activate their fight or flight mode (locked computer, threaten to have the cops show up, etc) and the second prey on poor people (send us money to authorize this big payment to you, buy this penny stock that we totally didn’t pump before, etc)
ARC can memory leak if you don’t properly use weak references when appropriate. You trade GC ticks for having to deal with a counter. generally GC will (raw language performance aside) have higher throughput (because its not spending time doing ref counts) but will have more sporadic latency because if the GC ticks, then your program is basically on pause until it’s done.
Comparing them as if one is better than the other feels like painfully missing the point. Completely different memory models. And if you’re only slightly making use of ARC, then switching to a GC is a big jump.