Marketing "the best" (most expensive / newest) aren't the best, for most purposes.
I bought a T480 with dual batteries that does run for 10 hours. It has a 2 TiB SSD and 32 GiB. Works fine for me. Water-resistant, repairable, awesome keyboard, and MIL-SPEC drop rated too. Optional magnesium display top assembly cover.
Unfortunately, the best ones aren't anymore.