Xeon Phi and Itanium were niche products anyway. One could argue Intel was late to the party regarding Phi since at that point, NVIDIA had ~3 year headstart in the GPGPU market. However, despite that you say that Intel gave up on Itanium the moment x64 was out, they still supported it until 2021. For a "dead on arrival" product line, that sure is a long support time.
I don't think Intel threw in the towel with XPoint, considering it still performs much better than flash memory in terms of IOPS, which is a much more useful spec than raw bandwidth. But if it's going to die, it'll be because Intel doesn't want to share the technology.
Intel still has a extensive NIC lineup. And if anything, Intel can "convince" system builders to use their GPUs anyway.