Personally, I'm sorry for the saltiness of that last discussion Inmemorium. Instant grenades is definitely an OXC thing that makes a pretty fundamental difference in the tactical game and as you have seen, some folks get some fairly strong opinions about it.
I personally thing OXC Speedruns are kinda cool. I tried a few myself as an idea for YT vids a few years ago but the 1st month Base Defense bug cured me of that pretty quick. That 6 min speed run on classic with save scumming still seems pretty amazing, but I wouldn't have the patience for it with OpenXcom. Anyway, thanks for posting these.
Cheers!