Here is a great point from the HOA Leading website
Term Limits for HOA Board Members
"The biggest pro is that the risk of a tyranny may be lessened. "You may be able to reduce the possibility that there's what some people might consider a dictatorship, where a long-term member appears to rule with an iron hand,"
"When you always have the same people or a particular person on the board, there can be the impression that things are being run for the benefit of one person or a small group of people as opposed to the good of all.
By having, encouraging, or requiring board turnover, you might have more openness and more people involved in the association's governance."