The objections the author had way back in the day are no longer the objections programmers of mainstream languages have to Lisp today.
Today the objections I hear are more along the lines of:
1 - All those parenthesis. (Still a top objection)
2 - Lisp doesn't look like or work like what I'm used to.
3 - Lisp doesn't have as many libraries as the most popular mainstream programming languages.
4 - There aren't nearly as many Lisp programmers, so it'll be hard to find more to join your project/company if you use Lisp.
5 - There aren't nearly as many Lisp jobs, so why bother learning Lisp if you're going to have a hard time finding work using it?
6 - Lisp is ancient, and anything that old is useless and primitive compared to new and shiny languages.
Today the objections I hear are more along the lines of:
1 - All those parenthesis. (Still a top objection)
2 - Lisp doesn't look like or work like what I'm used to.
3 - Lisp doesn't have as many libraries as the most popular mainstream programming languages.
4 - There aren't nearly as many Lisp programmers, so it'll be hard to find more to join your project/company if you use Lisp.
5 - There aren't nearly as many Lisp jobs, so why bother learning Lisp if you're going to have a hard time finding work using it?
6 - Lisp is ancient, and anything that old is useless and primitive compared to new and shiny languages.