In my experience this aspect is chronically underestimated by devs. The change needs testing. Change Management might need to create artifacts. Help articles might need updating. Certain clients may need a heads-up. All the PMs need to be briefed (this change is outside of their roadmap so it'll be a fun surprise).

As an org grows the piece of the Effort Pie that is Development gets smaller and smaller. It's not that development gets easier, it's that every other part of the process grows in size and importance faster than the Development piece grows.

It takes about an hour of developer time to incidentally produce 20 hours of work elsewhere in the company.