It was not question where I should keep money. Also I do not think it is relevant in terms of residency - same scrutiny shall apply.
IMHO, sometimes UAE banks are strange, have bad service and not honest. I do not want my money to be siphoned out eventually by some private banker or account blocked without any proper reason. Also I expect it to be nightmare to sue bank in UAE. Democratic countries with offshore habits seem more reasonable to me for banking - Bahamas, Cayman, USA, Switzerland... etc. My accounts are currently there and all is fine.
I saw many cases of clean honest e-commerce accounts being blocked in UAE. Retail bankers almost asking directly money to solve issue, etc. etc. Weird compliance questions and stuff.
Also, I do not like to physically spend time in UAE now. Too many russians and all that temporary expat. mode of everyone besides locals.
Why 183? They need 90 days of stay to support gold investor visa and they do not have clear tax residency rules (check PWC).
They do not have TRC in Bahrain. They have COR (Cerificate of Residence). I think those 90 days are actually not enforced and I think they shall cancel that minimum stay as UAE did.
Also I assume I can move out money in case of such request and tell bank that 1. There is no TRC. 2. If they ask for COR -getting COR is just too complicated (which is true) and I would better just close the account and move to another bank. I think it is negligible bank shall do anything worse then just closing account after that.