The 6” 2-way is the most versatile and practical speaker design for home stereo is why. A 6” woofer can go deep enough to blend with a sub, and high enough before breakup to match a dome tweeter and maintain good off axis linearity. Bigger woofer 2-ways of yesteryear had midrange issues or larger tweeters that couldn’t reach the top.
Just how many options does 1 need in a 2 way bookshelf design?
Do we really need this many options in a 5-6" woofer 1" dome or if lucky AMT or Ribbon bookshelf speakers? To me, these are the lite beers of audio design.