Is there a technical reason for the web limit to be 16 GB specifically? Or is it just a round number picked so that the limit could be standardized? Also, has t

Is there a technical reason for the web limit to be 16 GB specifically? Or is it just a round number picked so that the limit could be standardized? Also, has the limit on JS heap size (and ArrayBuffer size) also been relaxed to 16 GB or is it still lower?