- Loosing special permissions demotivates editors. (I am here
particularly interested in temporary admins of smaller wikis who didn't show up the second time to ask for temp adminship again.)
I have a personal experience here, since I was a temporary admin on Lak Wikipedia for I believe two months (it must be smth like end of 2008). There was no community (and there is still no community), but we (three users who did not speak any Lak) tried to reach out to Lak speakers on some discussion forums. I felt that first the Wikipedia should be cleaned up (logo uploaded, vandalism removed etc), and asked for the temporary adminship (first refused by Angela who did not read my request properly, and then done by another steward - she never conceded or apologized). Once it was done, I did not feel any motivation to extend my adminship, though I am still regular on that wiki, visiting it at least every second day. In these three years, I had several occasions which required a sysop intervention, and then I put the delete template or asked stewards. I think many temporary sysop cases are like mine.
Cheers Yaroslav