Basically buying new Intel processor to replace old will yield 5-60% performance in I/O-heavy workloads even without any other changes but fixed processor bug, unless you're ready to tweak with your OS settings and fine with potential vulnerability. With proper marketing they can make huge profits from this situation. Sure, you can buy AMD, but Intel is still faster for many benchmarks. Given that they knew about bug for 7 months, I think that soon new processors will be without Meltdown bug.