Internet use disorders: What's new and what's not? Commentary on: How to overcome taxonomical problems in the study of Internet use disorders and what to do with "smartphone addiction"? (Montag et al., 2019)

This commentary critiques the recent paper by Montag et al. (2019) and (i) argues that there are a number of issues that are presented as contemporary but have been discussed in the internet addiction literature for over 20 years, (ii) argues that generalized internet use disorder (IUD)/smartphone use disorder (SmUD) and specific IUD/SmUD may mean different things to different scholars, (iii) suggests that online activities that involve content creation often utilize nonmobile devices, and (iv) suggests that there are some potentially problematic online behaviors that are not included as major activities in the proposed in Montag et al.'s taxonomy of internet-related problematic behaviors.