It was a while ago… And I think I’m not hallucinating that (one) 
– I just did a quick search, and @Quexten also mentioned this (older) limit e.g. in this post here from 2023:
The resources should not be a problem - even on an iPhone or Android phone. The only edge case is iOS autofill, due to a software restriction that is part of iOS. Hence the recommendation to lower the memory to 48 MiB.
(emphasis my edit)
Well, not important anymore then, when the current default of 64 MiB is not problematic for iOS…