I am just curious but what is the progress right now with RetroPie for the Pi 4 at the moment and sorry for asking just waiting for a build of it first before i would buy the Pi 4 and do you guys think the 2gb model would be more than enough as well?
Most people view 2 GB as more than enough to run emulators and emulationstation proper. I personally jumped for the 4 GB as to be ahead of any changes.
Oh ok well i wanted to buy the 4gb model but here in Canada it is a little much plus for certain arcades games i want to try out in my mind i tend to think 2gb would be enough because the first game i want to test out for sure is Killer instinct 1 and 2.
I'll be getting the 2GB version. I just don't see the point in getting the 4GB version unless you're going to run desktop type workloads or know, specifically, that your workload is memory intensive.
More RAM is also useful for speeding up repeated hdd/ssd/sd access, since Linux uses unused RAM for buffering the file system. You can see this via the command free -h ("h" means "human readable" for more human-friendly numbers). Example from my Laptop:
total used free shared buff/cache available
Mem: 7,7G 2,2G 2,5G 405M 2,9G 4,8G
Although the "free" memory seems to be only 2.5 GB, temporary buffers take 2.9 GB. The real amount of free RAM is 4.8 GB, since the system clears the buffered data as soon as the memory is needed elsewhere. (Don't ask me why the numbers don't seem to add up perfectly, I don't know the actual math behind it.)