Leaving a Will can lead to a load of grief too if someone contests it. Intestate Law is pretty straight forward and relatively fair, and as i understand it, cannot be contested.
My dad died without a Will. Mum got everything... it really is that simple.
My Sister died in 2017 with massive debts and no assets, no Will, no dependents.
It's now 2021 and we have yet to sort out the estate .......
My Brother-in-law died last month, with some debts, no assets, no Will, no dependents.
I expect this one to be resolved by 2027.
A written Will in both cases would have made life so much easier for all concerned.