I use Ian's (Fast) Knot and that's good enough for me.
I never taught my children anything but the '(Fast) Ian knot', so they know no other way. They are older now, but when they were younger, they were often the friends of 'first resort' when it came to getting their shoelaces tied when they came undone.
They've also taught many other children 'their way' of tying their shoes.
I should probably donate. It's a small thing, but definitely something that has made our lives (and those around us) better.
Laces type matters a lot here. I've run countless miles with a fast knot without it ever coming undone.
The secure knot does feel like a cheat, though. It's like a double knot that you can untie like a single. Witchcraft!
I just tried to do the old fashioned knot, it might be the first time I've tied it in two decades.
As a kid my laces would come untied all the time. The Ian knot rarely has an issue.