If you mean popular as in the antonym of unpopular I don't think elisp can be called popular. I have written several thousand lines of elisp outside of my Emacs config, and it is probably my least favourite lisp - and I believe most people who know more lisps than elisp think like I do.
Dylan was a great language - I played with OpenDylan a bit. Scheme with CLOS and gradual typing, and a formal specification, and a stdlib, and tools for modularizing and AOT compiling and linking multi-module projects, hygienic (syntax-case-style) macros, and so on, all in ca. '95! It was a bit too late and Java took over the world before Dylan had its chance... Imagine the world, full of sunshine and rainbows, if Dylan prevailed - instead of the dreary, stifling, primitive language we all know and love (to hate).
Racket is doing nothing similar to Dylan. Dylan was a well defined language for programming in the large and targeted at enterprises. Racket is a laboratory and a workbench for creating languages. It accomplishes this by implementing incredibly powerful macro and module systems. Other notable features of Racket are delimited continuations, contracts, and the Typed Racket dialect. It is targeted at researchers and beginners and has nothing to do with the enterprise. :)
I'm a Common Lisp fan, but nobody would claim that it is popular. I don't know that "popularity" is as subjective as you describe.
It's completely subjective. The objective metrics (if web search are them, which is kind of dubious) tell us that whatever-language-you-like is probably orders of magnitude less popular than Fortran. The "real" popularity that you experience - how big the community is, how many packages are published, how many success stories are there - heavily depend on where you are, who you know, and what you want.
The index: https://www.tiobe.com/tiobe-index/