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I would suggest that manufacturers assume [rightly or wrongly] that most people that buy scopes larger than around 100mm, are fairly
serious about their hobby, and would like to be able to track the stars
using one axis only. EQ mounts suitable for Newts up to 150mm are
cheap [ EQ3 for example]. With just an R.A. motor and rough polar
alignment you can track well enough for visual work. One session with a basic EQ mount is all that is needed. Just plonk it down with the
counterweights facing approximately South, and the motor will keep the target in view for quite a while. Alt/Az mounts for larger scopes are available, but are pricey. Manually operated Alt/Az mounts are a pain.
raymo
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