We Made Amiga, They Fucked It Up (2015)
It wasn't all marketing.  The Amiga was expensive for the day.  I had a C64 and wanted one badly, but as a poor college student I could only upgrade to the C128.  The Amiga also competed against the cheaper Atari ST.Businesses buy computers for the software and the Amiga did not have Lotus 123, MS Word, Multiplan, or Excel.Microsoft after a certain point stopped supporting niche platforms.  I had Flight Simulator and Multiplan on the C64, for example.  The Amiga did not have either.The Amiga did eventually find a niche where it was known to be the best solution but it wasn't a large enough market.https://arstechnica.com/gadgets/2016/03/a-history-of-the-ami...