64bit devices* should never have come with only 1gb ram imo. Had an Air 1 and 6 Plus, lousy experiences due to the reported 20-30% extra overhead of 64bit over 32bit (which was very apparent to me, ymmv), yet still rocking the same 1gb ram. It's absolutely fine that some people found, or still find, these devices adequate or better. I absolutely didn't. Unstable pita, crashiest iOS devices I've owned. Along with constant tab and app refreshing, my most common grievance was this - pause podcast (with Overcast), do something else, go back to unpause with CC (or that OS's equivalent) and Overcast is flushed and the default music player starts playing. Garbage experience, especially considering 90% of my usage is browsing and podcasts. Never happens with the 2gb devices.
*the 5S was a decent experience, likely benefitting from the much lower res, lower expectations and maybe less intensive usage on small phones.