This is not a dicussion about options.

This is OSM History: NOT OK > NOT OK > OK > OK + CORRECT > ERROR > more ERROR

9/19/07  > highway=pedestrian (AND import therefore not error, but best guess in those days)
9/12/08  > highway=pedestrian
10/23/09 > highway=unclassified
6/18/21  > highway=residential (most correct)
6/23/22  > highway=service (60% correct: no residential houses/front doors)
4/7/23   > highway=service + service=alley

Now Boomklokstraat is highway=service. Not correct: not a "toegangsweg", but also throughroute.

Now Boomklokstraat is service=alley. Not correct, this is not a "steegje".

Correct is highway=residential + name=Boomklokstraat