Once AZO is gone all there will only be contact printing on enlarging papers for those not interested in platinum, kallitype and other alternative processes. So I imagine there will be growing interest in using other available papers and methods for silver gelatin contact prints.
8x10 can easily be contact printed (maybe 11x14) with any 4x5 enlarger that is set up to use varible contrast filters. To print bigger or without an enlarger you would only need a light source (bulb, LED array, flourescent) that is color balanced for filters, build a simple housing to hold light source and filters under the bulb and you are set. You would need to use large theatre gels, 6" or 8", from someone like Rosco. They make filters that are direct matches or close equivalents to the standard Kodak/Ilford variable contrast filters.
There are all kinds of other techniques for contrast control applicable to contact prints that would be tailored to using VC paper. One could use an over mask of clear film in register with the neg and dodge areas with graphite or translucent color washes that would work the same as filtration for specific areas of the negative.