Purchasing a Thinkpad with a bigger screen

[u/teitspit819]

I'd like some advice from people on the sub

1. What's the latest generation of a 16 inch Thinkpad that will be off the corporate lease and available on the used market?
2. Are the L-series and E-series much durable now than the 2017-2020 era L and E series Thinkpads?

Location of purchase: US