I oppose term limits for one simple reason: they deny Voters the choice of representation. We wouldn't think about tell a brain Surgeon, "You have saved too many Lives. You have to retire"; why would We do so for equally important public Servants?
Even this were not true, studies show countries with term limits go to war more often than those without because Legislators have no need to satisfy Voters during Their last terms. Likewise, Voter dissatisfaction is higher for People with "Lame Duck" Representatives for the same reason.
Additionally, term limits make Lobbyists the only institutionalized memory in the capital, amplifying Their influence at the expense of Voters.
Lastly, a mechanism already exists to remove "bad" Legislators and keep in good Ones: elections. Studies show ineffective and/or greedy Legislators are almost always removed within 3 elections or less, IF They ever get elected in the first place.
Term limits are unnecessary and harmful to the idea of good governance and should be rejected.