How important is the efficiency of a speaker to you?

Sorry you were belittled, but I think every manufacturer has to find their niche. 

I think that the truth of modern speaker building, especially 2-way systems is that they often give up efficiency for bass output, so I don't really think we can make the case that most speakers should be able to be driven by modest amps.  However, there's a big gap in "normal" 2 way speaker efficiency and say something like the Kef Ref 1 Meta (or whatever it's called) which is technically a 3-way with just amazingly bad impedance curves.

Your average 2-way is not that bad and a modest (50 wpc) tube amp will do well with it.

If you want a 2-way with excellent bass and very tube friendly look at Fritz.  Really excellent.

I just posted this elsewhere

I advise working very hard to find efficient speakers you love, they are out there. Don't even listen to inefficient ones.

That will keep the needed power down: less: cost/size/weight/heat and it will increase placement options of amps, especially integrated with a need to receive signal from a remote.

Importantly, low power needs allows a much easier way to try tubes.

More competition exists at lower power needs, thus more competitive prices, and more used choices.

I have main-system speakers of 89bd/4ohms, 91db/4ohms, and 102db/8ohms. They match up with main amps of 100w Class A SS, 65w PP tube Class A, 8w SET, respectively. Each time I swap in a new combo, it’s my favorite. Many roads to Dublin.

generally not important, unless it's extreme...

My point of view is that it is a challenge to find speakers that perfectly match your specific sound quality values. It gets much harder by restricting yourself to a subset of speakers.