Hyperthreading costs almost nothing in terms of chip area and increases the performance of things like JavaScript or Python based Webservers significantly. Sure

Hyperthreading costs almost nothing in terms of chip area and increases the performance of things like JavaScript or Python based Webservers significantly. Sure your ultra optimized HPC workload or video game isn't going to benefit, but the performance cost for those is very small. The worst part of hyperthreading is handling CPU exceptions and keeping privilege levels separate between the two threads.