> My goal was to ensure that we have collected from as many potential sources of randomness as possible to ensure a quality initial seed for userspace random number generators. So, it includes everything, including sources considered "low value", like interrupt timings.

While a TRNG is fundamentally necessary for initial entropy, it is generally a good idea to mix as much other randomness as possible to reduce your dependency on a single source, in case that single source turns out to be biased. So I agree with the author that there is still some value in the "low value" options.