Interesting article/study. [Research done on "telomerase deficient mice". May or may not be relevant to aging humans.]
Article: The CNIO discovers that rapamycin has harmful effects when telomeres are short
https://www.eurekalert.org/pub_releases ... 022820.php
Open access paper: The mTOR pathway is necessary for survival of mice with short telomeres
https://www.nature.com/articles/s41467-020-14962-1