As some people have noted, shock mounts may be needed more or needed less depending on the microphones you're using. The odd thing is that shock mounts are needed more often for the kinds of microphones that don't have the most extended low-frequency response as far as sound itself is concerned.
To be specific: Pure pressure transducers (for most folks here, single-diaphragm omni condensers) may well need no shock mounting at all, even though as a rule their low-frequency response goes the deepest of all. But they are relatively insensitive to physical vibration, in part because their diaphragm tension is relatively high. And pure pressure-gradient transducers (figure-8s), and highly directional microphones such as supercardioids which have mainly pressure-gradient sensitivity, generally have rolled-off low-frequency response--yet they're the most sensitive to picking up noise from external vibrations.
A few years ago I was recording a classical chamber ensemble with a pair of single diaphragm "wide cardioids"--mainly pressure transducers with a certain amount of pressure gradient response mixed in. Between two pieces there was some rearrangement of the players, so to keep the recording in good balance I picked up the entire mike stand, moved it and set it down while continuing to record. I was using only a fairly basic shock mount but on the recording there is no noise whatsoever. That definitely wouldn't have worked out as well if I'd been using my supercardioids (which are also more sensitive to the noise from any air motion, and thus tend to need wind screens or pop screens more).
--best regards