Clay tile laterals went into Wichita properties through roughly the 1950s and a great many are still in service. The pipe body itself is durable and often sound after eighty years. The joints are the problem.
Clay tile was laid in short sections with joints every few feet, and expansive Kansas clay soil moves those sections slightly with every wet and dry cycle. Over decades the joints open, moisture weeps out, and roots follow it in.
Where multiple joints have opened, replacement makes more sense than repeated spot repairs. Where one joint has failed on an otherwise sound line, a spot repair or a liner is the cheaper and equally durable answer.
Technician insight
Expansive clay soil is why Wichita clay tile joints open faster than the same pipe would in sandy ground. It is a soil problem as much as a pipe problem.