Bash is my current shell, as it seems to remain the de facto standard shell in linux environments (such as containers).
Bash has certainly accumulated a fair amount of warts over the years (in addition to quirks that seem a natural consequence of offering a shell and a language) and I also may have a background desire to shift from what a specialized shell to more of a general purpose REPL with appropriate extensions… or perhaps more likely seek an alternative interaction model altogether, but bash knowledge tends to remain valuable and something I make use of heavily and therefore it is unlikely to go away (if anything I’ll likely explore a leaner alternative that provides a subset of compatible behavior).