There is a clear distinction in Lenovo's ThinkPad lineup as to which series is more premium: The ThinkPad T-series ranks ahead of the ThinkPad L-series. Nevertheless, there's one area where the ThinkPad L-series scores better, because the Lenovo ThinkPad L14 Gen 2 AMD can be upgraded more than all other current 14-inch ThinkPads.
https://www.notebookcheck.net/The-Lenovo-ThinkPad-L14-Gen-2-is-one-of-the-most-upgradeable-2021-ThinkPads.553569.0.html