The House Budget, Ethics and Intelligence committees have term limits, all for specialized reasons-for example, no one would serve on the Ethics Committee if they had to stay there permanently. There is a bad element to this idea. Legislators develop expertise in a few subject areas through long service on a committee. That expertise would be lost. The gain in breadth would at least equal the loss in depth.
Legislators rely chiefly on staff for depth anyhow.
It is breadth that the legislator is supposed to bring to the job. The seniority system wouldn't change much under committee term limits. Senior members would still get first crack at chairing committees and subcommittees, but the privilege would be based on seniority in the House rather than seniority on the committee. Thus, committee members would likely be on their third or fourth pairs of committees before they became chairs. They would be that much further removed from the interest groups that dominate back home.