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Space: Because you can have
multiple drivers on only a two-lane track a digital layout can
be more compact for the same number of drivers. This can be
very helpful if you have only a small space in which to build
your layout.

Two SCX
digital NASCARs race nose to tail while a third changes lanes to
pass.
Cost: Digital race sets and cars are more expensive than
conventional ones because of the cost of the electronics
involved. However, because you only
need a 2-lane track to accommodate 4 or 6 cars and drivers you
don’t need to buy as much track as you would need to build a 4
or 6-lane conventional track. This issue can go either way,
depending on how big a layout and how many cars you want to
have.
Complexity: Conventional racing is simpler, as the
driver only needs to control the car’s speed and doesn’t have to
concern himself with making lane changes. Most people can pick
up digital driving fairly readily, but for small children, who
have a way to go in developing coordination
and attention span, conventional racing can be easier to master
and less frustrating, resulting in a more successful initial
experience with the hobby. Conventional cars and controllers
are also simpler and more maintainable with fewer things that
can go wrong and no need for cars to be programmed before
running them. In general, however, digital systems have proven
to have quite adequate reliability.
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