(Just posted about this light, but I'll give it another go)
The AKoray lights are every bit as good as advertised, however, the Q5 emitter is aging. They still represent possibly the best bang-for-buck value, but as emitter output and efficiency improve, members of this forum are increasingly willing to pay more to get more. Don't forget that only the truly collectible lights with massive followings (SF, HDS, etc) are able to continually generate a buzz thanks to their loyal fanbase.
If you look at most of the current offerings in the small EDC category, we're sort of at a plateau as far as light output is concerned. Between 200 and 300 OTF lumens (from XR-E, XP-E and XP-G) seems to be where we're at for small EDC powered by Li-Ion. (Except that really sweet looking Zebralight SC51 which claims 200 OTF on an Eneloop.:thumbsup
While it certainly isn't everything, output is a major factor of I'd say 75% of the light purchases made by the educated members of this forum. (And probably 99.99% of the purchases made by the rest of the world). So considering that plateau, and the usual desire to have the next best thing, even small incremental increases will see purchases at this point.
Until someone shoves an emitter producing over 500 lumens in an EDC size (that doesnt have laughable runtimes like the D-Mini VX Ultra on 123 batts), I think these trend will continue.