Microsoft was their "lender" of last resort https://www.mentalfloss.com/article/84258/date-1997-microsof...
It showed that software rendering on increasing faster Intel CPU's could outmatch the Amiga chipset which stagnated because
a) The original chip/OS architects left Commodore b) It was too closely tied to the Motorola 68000 timing/bus architecture which did not match Intel.
Once you had those and a serial terminal program for your legacy system there was no way the 8 bit inspired computers like amiga would ever compete again. Macs were a distant but respectable competitor but only in niche markets. Then networking shut the door completely. If you system couldn't do ethernet you were boned.
The workstation vendors had a brief period where they had a shot but the PC market caught up too fast.
Doom was fun but by 1993 when it was released the PC had already dominated the market for over a decade.
I did ARCnet for quite a long time before 10base2 and eventually 10 Base-T took off.
If you were really poor, you could use "The $25 network" from Information Modes and serial ports.
What were you using ARCnet for?