Lol...Marie...
The first time I was in Kingston we had a lovely driver friend with us from the Negril area. We would visit various places in Kingston and more often than not, someone was saying I don't understand you (to our driver friend) and asking Rob and I to translate.

We've been in Kingston all week & listening/chatting to anyone under 30 years, maybe even 40ish...while you can definitely detect an accent, there's barely if any patois when they speak to us or each other.
After living here for years (especially for Rob) Patois of course becomes part of your life...but with these younger Kingston Jamaicans the patois was definitely not as common for everyday speaking.