Series and parallel LED using
A constant voltage LED driver is attractive for its ability to run multiple strings in parallel, but this comes at a cost.
The first is the series resistor in each chain.  This is required here to account for the variability in the diodes' \$V_F\$, but it accounts for up to 40% of your power consumption \$\big((24V-14V)/24V\big)\$.  This is more heat, which must be a consideration.
Heat may cause premature failure, which is a another concern; you touch on open-circuit failure, which will shut down that path, but you should also consider a short-circuit failure.  Under constant voltage, if one LED short-circuits then the others will see a higher voltage, drawing more current and generating more heat.  This could cascade, via heat transfer, down one chain and across to others; worst case would end with the entire supply voltage being applied to the series resistors.  Your supply won't help, since \$24V/180\Omega*4=0.53A\$ is still well within its capability; a fuse could work but would be tricky, especially across temperature, because the worst case current is only about double the operational current.
A constant current driver eliminates all of this.  Any variation in \$V_F\$ is automatically accommodated, and the current directly controls the light output.  An open-circuit failure will still take out that entire chain, but a short-circuit failure will have no effect on the brightness or power consumption (heat) of the other elements.  But most important to my thinking, the series resistor is eliminated, making the entire product more efficient and decreasing heat dissipation.
A constant current driver requires one channel per chain, but the chains can be longer and the other benefits are probably worthwhile.