hah, certainly consumer choice largely ended.
It blows my mind how many computers existed in the 8 bit era, each with significant software libraries of their own. Spectrum, The commodore and atari machines, msx, amstrad cpc, bbc micro, undoubtedly more stuff I am forgetting about

Move up a bit and we are mostly down to amiga, atari, ibm-clones and mac's.
And today, you can pick between a PC running windows, a PC running mac os, and a PC running linux.