What happened to the BA146?

From:         tlong@mail.vcnet.com (Tim Long)
Organization: VCnet
Date:         20 May 96 09:54:37 
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I seem to remember around 1982 or so, PSA (later merged into USAir)
started flying the BA146. Lots of bragging about being the quietest
commercial jet aircraft flying at the time.I know they're still marketed
as the Avro RJ 100 or some such, but why so few of them? They would only
be 14 years old or so; you would expect them to still be flying/common.
What caused them to not become popular? Reliability? Cost of maintaining 4

I've never seen this clearly explained.