In what way aren't they "relevant"?
BullfrogKen's post number 9 shared why, and I will reiterate and add my take.
Note: I am speaking of the 9mm, as it was designed.
-The gun is a proven combat weapon, and is still in use all over the world, and still proving.
-The gun fits a wide spectrum of hands.
-The felt recoil to payload is managaeblae for a wide spectrum of hands, which attributes to quick, effective hits.
-Single Action - proven, and it too attributes to quick effective hits.
-Slim, and easy to carry, thus it does get carried
-It does not get much discussion, as :
(a) some folks are mature enough to find what works and see no need to re-invent the wheel.
(b) folks have been there , and done that with a BHP, and these types never have paid attention to the immature whom speak of things they no nothing about.
(c) Many today in society are into GroupThink, instead of being Free Thinkers whom do their own Investigation and Verification on anything.
GroupThink has its Gurus whom need Groupies - and Groupies looking for a Guru.