Yes, there is still a use for them...
1) Flood...when the L4 came out years ago, it was referred to as THE "Wall of Light", and became the standard by what other flood lights were compared too.
2) The nature of the Lux-V version of the KL4 allows it to be easily ran on lower power settings (search "TW4") or in two stages with a low/high ring.
3) Also due to the nature of the Lux-V, it's pretty easy too add a resistor and get the runtime/out-put you desire based on the resistor.
My L4 isn't going anywhere...it's a "Go-To" light...when I need not's of bright light right away in an emergency, the bright reflectored flood of the L4 performs...when KISS applies, the L4 performs.