Re: Sealed laptops
AE mentioned, "...T430-era laptop..."
Yeah, we've got FIVE of the Lenovo T-series laptops. They're still fantastic, even years after they were manufactured. Heck, I bought them used in 2014.
On the subject of tiny screws, I was recently replacing the battery in my silly MS Surface RT 2 tablet. It's infested with tiny T4 screws, and then even tinier T3 screws. CRAZY small. The torque required to snug them up is seemingly about 5% less than the torque needed to strip the driver bit. I went through three T3 bits by the time it was reassembled. Thank goodness that I had ordered several driver bit sets from eBay while waiting for the battery to arrive.