It hasn't been reviewed by SCOTUS for 30 years. With 87 percent of the public wanting term limits, it is ripe for review.
The pros and cons from the Federalist Papers:
The Federalist Papers also offered several pros and cons about term limits and tenure. Federalist No. 62 claimed that experience was essential to public service: “A good government implies two things; first, fidelity to the object of government, which is the happiness of the people; secondly, a knowledge of the means by which that object can be best attained.”
Experience is essential?. not so much. These days it has turned into a winning lottery ticket with the lifetimers enriching themselves. I have more faith in many of the young reps than I do in McConnal, Pelosi, Schumer, Nadler, Graham etc. who have served themselves for over 30 years.
However, Federalist No. 53 warned that tenured representatives could thoroughly become the “masters of the public business, and perhaps not unwilling to avail themselves of those advantages.” But an inexperienced legislative body would be “more apt will they be to fall into the snares that may be laid for them.” (Note: The National Archives attributes authorship of Federalist Nos. 53 and 62 to James Madison.)
That is obviously not the case anymore.