Agreed. These are fine little guns and it is a shame not to be able to shoot them. There was enough demand to get the 5mm Rem back into production, let's hear it for the .22 Win Auto and more .22 WRF, too.
I don't guess there are enough .22 Remington Autos out there to support, I have hardly ever even seen one.
Most of the other rimfires were chambered in either really old designs or really cheap ones and probably would not sell well enough.
Pity, Elmer Keith said he would like to have seen the .25 Stevens Long brought back and souped up instead of the .22 Magnum; but that would have required a lot of changes to guns that were easily magnumized while staying .22.