Having been a bit closer to the action (through secondhand reports from colleagues), it was not at all uncommon for Steve to propose detailed technical solutions, but (1) many of them were no good (2) his teams got pretty good at working around him on such matters and (3) I think over time he developed the good sense to trust his lieutenants on matters like this instead of being overly insistent on seeing his bad ideas implemented.

In contrast, in UX/Design, Steve generally had very astute insights, knew so, and it was much harder to get him to change his mind.

For a publicly documented example of a bad technical decision by young Steve that the team simply worked around for a while until he changed his mind, see: https://www.folklore.org/StoryView.py?project=Macintosh&stor...

he was however heavily involved in UX and design.