On Thursday, June 29, 2017 at 3:51:30 PM UTC-4, wrote:

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Miter saws and sliding miter saws do everything the radial arm saw does,
except more accurate and easier.

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Not everything. It's pretty hard to cut a 12" wide, 3/8" thick steel plate on
a miter saw. Put a metal cutting blade on radial arm saw and make multiple
passes, increasing the depth of cut each time. It takes time, but if the
plate is properly secured and you have a lot of patience, you can make some
extremely accurate cuts.

Try cutting the steel for this on miter saw.

http://i.imgur.com/JRkBl2y.jpg