The problem is that it is very hard to get something big from little splotches of time, or at least I find it hard, so I focus on little wins.
My company informally allows for spending time like this, but if it works out to an hour or two a day in between meetings and Slack requests, I can't really do much with that.
I write very little shippable code in first day of a 3 day task. Also my itch for unfinished work is very unhealthy. Does 20% favour guys who compartmentalize unfinished business to a fixed day every week and ramp up quickly?
My company informally allows for spending time like this, but if it works out to an hour or two a day in between meetings and Slack requests, I can't really do much with that.