> It could be still a problem though, considering many console games use all kinds of hacks to barely run at the target resolution/framerate.

If you had to slow down any of the consoles by 10% there would be tons of problems in the games. As you said, those games are highly tweaked to just barely run on those CPUs/GPUs.

I'm not sure about the PS4 and XBone but the Switch uses the Tegra X1, which has 8 ARM cores (4 Cortex-A53 cores, 4 Cortex-A57 cores), 4 of which (the Cortex-A57 cores) are vulnerable.

https://en.wikipedia.org/wiki/Tegra#Tegra_X1

https://developer.arm.com/support/security-update

Vulnerable to Spectre, yes, like nearly all speculative execution processors. The PS4, XBone and Switch are very likely vulnerable to Spectre all the same but that will probably mostly affect their web browsers.

None of these is vulnerable to Meltdown. That is an Intel/Apple/ARM Cortex A75 only thing.

It affects WAY more ARM processors than A75. All the fast ARM cores are vulnerable to one of the two meltdown flaws and half are vulnerable to a subset of the third flaw (with A75 being completely vulnerable).

https://developer.arm.com/support/security-update

> All the fast ARM cores are vulnerable to one of the two meltdown flaws

Do you mean Spectre? Meltdown is the Variant 3 in that link.

> It affects WAY more ARM processors than A75. All the fast ARM cores ...

The ARM cores listed on that page are not all the ARM cores in the market (or running in the real-world). There are many more ARM cores than listen in that table, and the page says any ARM core not listed in that table is not vulnerable to any variant of Meltdown or Spectre.