I wouldn't imagine so, some of the European LCCs minimum turnaround times are now down to 25 minutes for 180 or so pax, and that's nigh on impossible. offloading 180 pax and their bags and then re-loading the same, whilst re-fuelling for a 4+ hours flight from the UK to somewhere like the canaries, amd that's giving time for the crew to perform their required tasks is really pushing it.
In terms of boarding, from a professional stand point I prefer to have an airbridge stand, but with passenger access to the ramp, meaning I have the comfort of the bridge if the turnaround is long enough or the weather is really bad, but if I need it I can still board front and rear.