Only five years ago, CL's web presence was not attractive. This included "official" websites and online documentation (despite all the great books). It's better now (common-lisp.net was reshaped, there's lisp-lang.org, a better Cookbook, the CL Community Spec, more YT tutorials…)

there is no full-featured web framework (although you can write web apps of course),

no satisfactory GUI lib (now Gtk4, Qt5 (hard to install), IUP, nice-looking Tk themes, more low-level bindings to graphics libraries etc)

the package manager came late,

good open-source compilers came late,

less choice in editors (now many https://lispcookbook.github.io/cl-cookbook/editor-support.ht...),

and, well, lots of FUD and a language not for everyone.