Don't forget how Loveable used the moment as an acquisition tactic, which was probably the whole point.

I think the point the parent comment is making is that companies shouldn't be able to trademark common phrases with their usual spelling. 'Dev mode' is a common short form for 'developer mode' which has extensive use.

I wrote a little about it, because it's more complicated than "a trademark": https://jonatron.github.io/randomstuff/trademark/fig.html