What specifically has gone poorly? Is a dozen bug reports high or low compared to previous versions of the software where humans are writing the code?
I don't use ledger-cli myself but I do use the similar software hledger. I don't pay very close attention to hledger's development process, but I haven't noticed any bugs that affect me in years of using it.
A regression here and there would be normal before, major features breaking in this stable 25 year old software is simply unheard of.
This is not exciting cutting-edge software, it's a boring financial app. My instinct is people want stability and confidence that the output won't change and that their records will still parse.