The first Amiga (to be known as the Amiga 1000) was special. Revolutionary.
Memory was the ceiling for multitasking for all PCs until relatively recently (Last 12 years) Because it was so expensive and usually programs were written to use all that a standard configuration supplied.
Windows 95 had 32 Bit preemptive multitasking with 32 Bit application protection. But you needed a lot of memory to run multiple programs. Luckily you couldn't install pizz poor marketing bullcrap onboard most MBs.