Merging PREEMPT_RT (real-time) into the Linux kernel only occurred in Sept, 2024, after 20 years of work, in part due to a fundamental conflict with printk(), t

Merging PREEMPT_RT (real-time) into the Linux kernel only occurred in Sept, 2024, after 20 years of work, in part due to a fundamental conflict with printk(), the traditional "printf" of Linux, widely used for kernel debugging. Linus is unwilling to forego printf debugging in the kernel, and has blocked significant evolutions of Linux on its behalf. That counts for a lot to me. Anti-printf people have to go a long way to convince me that it's somehow not ok. I use debuggers every day. I use some form of printf debugging every day. I use whatever affordance I can get my hands on, and I ignore the peanut gallery.