Amiga 500 Plus ("the shortest-lived Amiga")

Very briefly, and sometimes without realising it, you could buy an A500+, and Remi picked one up for a reasonable price:

And a slightly painful but ultimately advantageous move away from slavish backward compatibility:

Mainly due to the new Kickstart ROM, a few popular games failed to work on the Amiga 500 Plus. … It also encouraged game developers to use better programming habits, which was important since Commodore was going to release a new generation of Amiga computers later the same year