Choke on valve HT was there for higher anode current applications, as rectifier tubes really do not have a very good overload characteristic, and have very poor pulse rating compared to a silicon rectifier diode. Thus the choke, to reduce peak pulse currents, and thus losses across the rectifier, and as a bonus lower ripple on the supply lines, so the poor power supply ripple rejection of the amplifier was not going to introduce hum with high ripple voltage. Remember on valves the other grids are also connected nearly directly to the power rail with almost no decoupling. Valve rectifier anode drop is current dependent, and even a small rise in current leads to a very much hotter running anode, and as they typically ran at 500C at full rated current, just a small increase could get them to 800C where they glowed visibly red, and then they would start to have secondary emission, go into thermal runaway and kill both the rectifier tube and the power transformer.
On lower voltage higher current supplies the choke however gets very big very fast, in fact the best way to have a choke power supply is to design it into the power transformer, making it larger, thicker wire and have some leakage inductance in it. Thus the ferroresonant transformer, which can have a pretty low ripple supply voltage at a very high current, and as a bonus the conduction angle of the diodes is very large, as the high harmonic distortion of the output makes it a more trapezoidal waveform than a sine wave. Added bonus it is self limiting current wise as it will tend to be a constant power over a certain current, but under that is is relatively constant voltage.
They made great wet cell battery chargers, as they were able to charge a fully discharged bank without any attention, and would float the cells once charged. Only disadvantage was they ran hot at high power, and had a fixed no load dissipation that could be a good part of the full load rating.