I have personally never used an airbridge at STN in about 40 odd flights from there and can honestly not tell you the last time I saw an aircraft using one there either. Granted I usually use FR (I've used a bridge at other airports with FR, mainly BSL and once at LGW), but I've certainly used EZY a lot from there too and not once has it been on a jetty.
I'm not denying they are used, but if it is daily then clearly I was just unlucky.
Belfast City has one jetbridge gate too.