That's just the usual trifecta of
"It's not a bug"
"Everyone got it"
"It's not as bad as you think"
For example
Intel believes these exploits do not have the potential to corrupt, modify or delete data.
actually means "yes you can read kernel data".
Right now the status is:
Variant 1 (Spectre/bounds check bypass):
Patchable, use conditionals instead of branches.
Relies on kernel-mode (so in the OS) interpreters or JITs executing the code so as soon as those are patched it's fixed.
May not even work with default configs on AMD.
Should not affect performance noticeably, especially if you're not using anything that's affected anyway.
Variant 2 (Spectre/branch target injection):
Patchable, don't use indirect jumps or prevent speculation on them or if possible invalidate the branch predictor on a context switch.
Depends on the specific branch predictor (CPU hardware). Intel Haswell has been proven to be affected and ARM says it also affects all Cortex cores. AMD claims theirs won't be vulnerable to it, but they are the only ones that actually know the inner workings of their hardware so it's difficult to verify.
The brute force patch Linux will use for now will affect performance, but I don't know by how much. Future patches might reduce the impact.
Variant 3 (Meltdown/rogue data cache load):
Patchable, flush TLB on every context switch.
Depends on the specific architecture. Might affect anything newer than the Pentium I from Intel (except Itanium and first gen Atom). According to ARM themselves only the Cortex-A75 is affected. AMD claims they are immune and so far it looks like it.
This is the one everyone is talking about. The performance impact depends on what you're doing. Pure number crunching won't see a noticeable change but for example file accesses will slow down rather significantly.
Unlike Spectre where multiple patches may still happen to close new security holes or to lessen the performance impact this will be more or less final. Unaffected CPUs may be added to whitelists later but if your is affected then it's going to stay like this.