The ILF is more a recurve style with that type of grip. Comparing the 2 systems what do you get with the ILF over the wood riser.
Options, options, and more options.
Is the system hard to set up if you change limbs. Does it stay tuned or is it like the compound always needing tweaking. I know the beauty is in the woods but what is gained in strength and harmonics of the metal riser.
Because of the tuning possibilities, I find ILF easier to set up than an one piece or conventional takedown. Tiller and weight can be adjusted, making arrow tuning a breeze.
It depends on the specific riser, but overall I find metal risers to be stiffer, with less flex and vibration. They are also cut further past center, increasing rest and tuning options. Many are designed to accommodate various grip styles, quiver styles and lateral limb adjustment if needed. They are extremely durable.
To each their own, but once you get beyond the beauty of the wood, the beauty of the functionality can make metal pretty darn attractive.