If anything, CS journals are more old-fashioned than those in natural sciences.
My least favorite part of publishing a CS journal paper is checking the proofs (in typesetting sense). I have already typeset the paper using LaTeX with the journal's template, but the journal almost always wants to typeset it again using another system. That apparently involves a lot of manual work by their staff. In the process, they introduce many errors into the paper, some of which are random and others which are consistently wrong. I have to compare my PDF to the publisher's version visually to spot the errors. And there is usually only 48 hours allocated for that part, despite the publication process taking 1-2 years.
My least favorite part of publishing a CS journal paper is checking the proofs (in typesetting sense). I have already typeset the paper using LaTeX with the journal's template, but the journal almost always wants to typeset it again using another system. That apparently involves a lot of manual work by their staff. In the process, they introduce many errors into the paper, some of which are random and others which are consistently wrong. I have to compare my PDF to the publisher's version visually to spot the errors. And there is usually only 48 hours allocated for that part, despite the publication process taking 1-2 years.