Gloʔal stops
What happens when glottal stops become the norm?
Danish happens. Danish developed the glottal stop (stød) a few centuries ago, although not all dialects of Danish use it. You can hear it in the famous foreigner-baffling rødgrød med fløde (four glottal stops).
Linguists observe that the glottal stop is also becoming more common in standard modern English. It was already a standard feature of London, northeastern and Scottish dialects. Now younger speakers - even young royals - tend to use glottal stops much more frequently than older speakers, which suggests this change is accelerating.
I don’t much like the sound although when I observe myself and others speaking, I notice that fully sounding every t sounds unnatural and pedantic, especially when the t occurs between consonants.