[pvdebbe]

Hyperthreads are just that - threads. It won't be 50 % slower with HT disabled.

[SXX]

Intel still charge extra $100 for it.

[theandrewbailey]

That's less than 50% of the price for CPUs with HT.

[floatboth]

Depends on the workload… If all the stuff you run uses different parts of the pipeline, HT helps a lot