I've certainly never heard every speaker brand that exist. But of the ones I have auditioned, no matter how good I thought they were, at first, after awhile I usually find, in some way, they're lacking, compared to the JBLs I've owned for over 30 years. I'm not talking low end JBLs either.
My current HT system, JBL Performance Series, one would have to spend many $k more(imho) to get better. Even my 30 year old L212s, that have upgraded XOs, are superior to many of today's current speakers.
Of the speakers I've heard over the last 6~8 years, that weren't JBLs, the only ones I had serious thoughts of buying were James Loudspeakers.
I've read many posts, on various forums, where people had bought one brand of speaker or another, and thought they were great, until they heard quality JBLs, and then traded up.