In 1987 you could get all the software you wanted for PCs - scientific word processors, programming languages, terminal emulators, graphics packages. The PCs had floating point coprocessors too. Early in the year the cheap Amstrad 1512/1640 etc. appeared. Where I was working was flooded with PCs by the end of the year, people were very enthusiastic. At that point, the Archimedes arrived - no software, no floating point support.
That is when Acorn lost, the vast majority of computer users in the UK had opted for the PC platform by 1987. All the experts, software companies, hardware suppliers and users had a vested interest in the PC platform after that date.