ARM architectural licensees develop their own microarchitectures that implement the ARM ISA spec, they do not license any particular microarchitecture from ARM (e.g. Cortex-A? IP cores). That includes Apple, Samsung, Nvidia and others.
No. It has become significantly easier for Europeans to immigrate since 2005. Labor certification alone now takes less than a year rather than multiple years pre-PERM. EB2 and EB3 priority dates are current. Europeans can expect to get a green card within a couple years (even accounting for the new mandatory Adjustment of Staus interviews for employment based applicants). It has become significantly harder for Indians where the green card backlog approaches a century (!) for EB2/EB3. The only thing that has become harder is getting an H-1B visa due to oversubscription.
It doesn't make sense for speculatively executed code to throw architecturally visible exceptions. The appropriate behavior would be to not perform speculative loads across protection domains (i.e. the behavior of AMD implementations).