They don't really need term limits. They need age limits. Similar to mandatory retirement.
When normal people hit 75-80, we're discussing taking the keys away from them and whether or not to put them in a group home so that they can have 24/7 care until they die. We're not discussing whether they should be running congressional committees that govern this country, or whether they should be given the nuclear launch codes.
And these fucks may be smarter and healthier than the average person at their age, but it doesn't mean we can't do better.