I’m not really arguing that. I’m saying there is a trade-off between having the common OS feature set described above (Ctrl/Cmd-select, etc) and implementing/it

I’m not really arguing that. I’m saying there is a trade-off between having the common OS feature set described above (Ctrl/Cmd-select, etc) and implementing/iterating a web/mobile product quickly. Often standard UI paradigms are never implemented or implemented inconsistently. AWS, widely known for their Agile practices, might be the epitome of this with their web console. Sometimes I can sort columns by clicking on them, sometimes I can’t. Some products allow shift or control click and some do not. Etc etc. I can only assume the product teams are doing their best within their constraints but as an end user it’s a piece of suck.