I guess that depends on the city and the procedure, but I had to replace my DNI last summer and it took me less than 30 minutes, and they gave me the new one on the spot.

In comparison I also had to renew my Japanese foreign card and later my ID card, and both procedures were a royal PITA, and in both cases I had to wait a month to get the new card.

Yeah had a close person getting passport after marriage, took years, they made a mistake, another 1.5 years. Took over 5 years in the end.

Lawyers making mistakes, civil cervants making mistakes, making mistakes themselves. Big mess. They are actually breaking EU law while doing these things.

That actually was very interesting for me, living in Spain, how extremely common mistakes were in data entry, generally. If anyone hands you a form to check your details, you can almost guarantee to find some issue. I've never noticed this living in any other country yet.