Ultimate 20/19/18 footers killing off the F18 and or F16 classes ?
M20, CFR20, Taipan 5.7, F18HT, Ventilo 20, 20HT, M18, eagle 20 carbon and probable one or two more.
None of these design were able to compete in any meaningful way and none show any current potential to do so in the future.
Seriously, we've seen many tries and all failed.
Most likely due to the $$$$$..... After all it is hard to justify the $$$$$$ for one of these for most people...... After all, for most it is only a hobby and many have the financial pressures of a mortgage, marriage and kids