Part of the settlement was that Intel had to fab for Digital for a long time and pay for a bunch of their patents. The Digital folks made it sound like it was a victory for them but it felt like the beginning of the end, and sure enough it was.
I think Alpha's big problem was people were still migrating to 32 bit code and here was a bunch of smartasses trying to push 64 bit processors 10 years before x86-64 became the flagship for Intel-compatible processors. During the time when 'Internet time' was a thing people said regularly and unironically. 10 years was forever.
We won't have to go to 128 bit processors for address space reasons. So I wonder what the justifications will be for doing so? And what features people will actually use it for when they have it? I suppose in some ways SIMD has skipped mostly over 128 to go to 256 and 512 bits though, hasn't it?
But I also know of 2 top-tier JITed languages that can use pointer packing to use 32 bit pointers for heap sizes under 32GB to save tons of memory. So 128 bit words would make pointers obnoxiously expensive.