It's been a full year with my L440. Got it used, from my father in law. Instantly I upgraded the 5400 rpm HDD for a HyperX 256 GB SSD. A month later, upgraded to 12GB RAM and later to full 16GB RAM. Upgraded the panel to FHD, 1920x1080. Most of the days I use also an external monitor, from 19" VGA to 27" HDMI via a DisplayPort to HDMI adapter. I'm a sysadmin, so I use this thing everyday with Ubuntu 20.04. It has only an i3 processor (Intel(R) Core(TM) i3-4000M CPU @ 2.40GHz) and it is by far the best laptop I ever owned (after using HP, Dell, Toshiba and Fujitsu). Yes, battery is not the best point, I barely use the trackpad since I use a gaming mouse, and I don't use Windows, so your mileage my vary. All I can say is: It fulfills my daily needs by far.
Also, having the maintenance manual is a big plus for me, also the amazing community at Reddit.