I mean, mostly, as someone who isn't even that enthusiastic for 5th or 6th edition. I just find the realism arguments kind of a weird way to replace "I don't like the direction of new rules" in people's semantics.
There is no realistic ballistic model for a troll getting shot.
Because neither the troll, nor the gun I am shooting him with, are realistic objects.
So to argue a given rules change is bad because unrealistic is a nonsense notion. Shadowrun is a game of rules that construct a reality through establishing exactly how tough a troll is and how much damage the fictional firearm hitting his chest can do.
That these change from edition to edition definitely changes the tone but does not make a given edition more or less realistic. It just creates another set of expectations for what's 'real' in a very camp, silly setting.
Also I'm looking forwards to the leeway the 5 edge spend 'declare something plausible but lucky that happens' gives to actually liven combat up past "take the obvious best position and then shoot a bunch," for all people talk about the deep tactics being lost by crunching boring but predictable modifiers has on the system.