One of the biggest changes for me, after decades of programming, is I've learned to be more of a stickler for best practices -- at least on projects I lead or ones I do solo. I'm more cognizant of the fleeting nature of time, that big one-way arrow-O-doom. So I don't "suffer foolish things" as much as I was willing to when younger.

I prioritize better. Or try to.

And I'm more efficient during sessions at keyboard / in terminal/shell. Effectiveness is king.

I do things in a different order, too. More likely to order my sequence of tasks/milestones so I achieve the most de-risking upfront. Test my assumptions. Flush out those "dark spots" on my mental map of the problem or solution space.

Age sucks. Experience rocks.