Honestly I didn't like the feel of space invaders and much prefer buckling springs,
Of course, I prefer the Model F over all others, hands down, but there is obviously room for many other mechanisms on the market.
I wonder whether Cherry really deserves the market share that they currently enjoy, or whether all the other mechanical switch makers have fallen by the wayside because of esoteric business fluctuations, including bad decisions on both sides of the supply/demand equation.
I think that Alps and Space Invaders both feel better than Cherries, and SMKs are very nice, too. But, except for Alps, you can only find these others in ancient, awkward configurations that require the user to make compromises in use, after he has gone to the trouble to track them down and buy them.
And now I am interested to try OAK!