Intel is the worlds largest chip-marker. They primarily make computer CPUs with high-clockspeed and low core-count. This makes their chips very attractive for applications that require high single-core performance.
Bugs in the system
Intel CPUs have been plagued with a very high number of serious CPU bugs which require a lot of software workarounds. It is possible to disable many of the Linux kernel workarounds for Intel CPU bugs. Doing so is not advisable but quite possible for those who value pure performance over security.
Intel's the #1 chip-marker
Intel was the number one chip-marker for a decade before being knocked down by Samsung in 2017. Intel regained the #1 spot in 2019.