Aside for anything else, backwards compatibility is good (repeatability for a certain behaviour). And it doesn't seem relevant as to why you'd completely ignore it when discussing cache eviction compared to Redis.
So yeah, I do not completely ignore Redis LFU, I just did not find useful to mention it because from my experience, Redis LFU is not being widely used, and does not have significant advantage over Redis LRU (if at all) and I wanted to maintain the focus and keep my post succinct and clear.
I also have not provided any benchmarks in the post, not because I have something to hide, just because I do not have an easy setup to benchmark cache efficiency vs Redis and I do not have time to invest into it right now.
Back then when I developed DashCache, I used Caffeine simulator to compare it to dozens other heuristics implemented in Caffeine using real-world data (twitter traces) and it was better than most of then (including LFU). It lost to algorithms that keep some information about evicted items (like TinyLFU or its extensions).