to be a little more explicit: there are ARM chips that are affected by meltdown.
People shit on Intel like it's their particular mistake, but POWER, ARM, and basically everyone's out-of-order cores except Ryzen were affected by Meltdown. It's some oddity of Ryzen's cache predictor that make it immune, basically everybody else was affected by it.
Well they’re typically not as superscalar in processing, which helps. But I wouldn’t make an assumption that ARM chips generally are more secure — plenty of weaknesses have been found, and doubtlessly many more exist. Security research has shown there are always new untapped directions to exploit, and really nothing can be assumed to be actually secure at this point. Like I said before, Intel is the big target, especially as they run the servers you access over the internet. ARM devices tend to be local and thus aren’t as valuable for side channel attacks. Instead, most attacks for ARM chips tend to be at the sandbox/OS level.
