Did Kaspa always use k-heavyhash, or did the mining algorithm change?

Kaspa did not always use k-heavyhash — an earlier, unnamed algorithm existed before it. According to Ori Newman, that earlier algorithm was developed in cooperation with a mining company and was specifically designed to make ASIC development easier; however, it had no relation to k-heavyhash, which is the algorithm Kaspa runs on today. For a beginner, this means that discussions of Kaspa's "early mining algorithm" refer to something entirely separate from the current one, so hardware or software designed for k-heavyhash cannot be traced back to that earlier work.