There exist reasonable arguments against term limits for members of legislative bodies, which arguments hinge on term limits greatly increasing the power of lobbyists, by effectively lowering the average skill and expertise of lawmakers.
In most fields of activity after 2-3-5 years you should you should be a reasonable journeyman and after 10 you should have a decent mastery of your field.
To me a term limit of 15-20 years should be more than enough.
Hardly comparable with software development work which is generally completely out of sight and therefore hard to quantify or verify. And I say this as someone who's been through the whole interview dance a bunch of times.