@6wli+1imjC8AM What the heck does that even mean: Intel couldn't get it done?
This isn't just about the fact that Intel is a cheaper faster processor than Z has any chance of ever being. (And Intel can run in a laptop or a major data center. Z can run wherever you have a chilled water supply.) It's also about the general awfulness of zOS and all of the stuff you need to make zOS do anything at all (CICS, various "connect" services, etc.) Linux and all hyperscalar cloud services offer a pretty easy way to build and deploy software without all of these semi-but-not-fully-redundant addons that you need with Z. (There is no "System Programmer" role in those settings! But wow you better have a good one if you want to run on Z)
When you say "Intel couldn't get it done," I'm pretty sure you mean "the wretched execution model on Z plus all of the extra cr-p you need to do anything put so many twisted threads into to the applications they were trying to port that it became close to impossible to figure out WHY it was ever necessary to do A or B or C on Z."
The fact that "Intel [they have compilers but are not a software company] couldn't get it done" really means that "Z [okay but not outstanding hardware; really awful software] caused so many horrors to be introduced over the years to the system was deployed [and, to be fair, making money] that no one alive can figure out what is going on in the system." The port most likely failed because Z caused the software [no one cares about the hardware in 2022] to be so obtuse as to take on a life of its own.
Anyway, what exactly did you mean?