I follow MustachianPost and ThePoorSwiss as US ETFs are cheaper and more tax efficient than Irish domiciled ETFs. My main investment is the ETF VT via IBKR.
@SwissStasher I am also very much inclined to go down this route. I'm not sure yet whether I should liquidate current positions and then reallocate or just leave them. In theory, it would be worth it in the long term.
@Tojasoku You can also make a compromise, for example, leave your current all-world ETF and save in VT to diversify your broker/ETF. This is how I currently do it: my old custody account contains VWRL, the new custody account VT.