I bought the E495 because the T495 had soldered RAM and one RAM slot, while the E495 had both RAM slots replacable. Adding more RAM didn’t need any special tools. Newer E-series and T-series both have one RAM slot and some soldered RAM. I’m guessing you’re talking about one of the consumer lines, like the Yoga series or something?
That said, Lenovo (well, Motorola in this case, but Lenovo owns Motorola) puts all kinds of restrictions to your rights if you unlock the bootloader of their phones (PDF version of the agreement). That, plus going down the path of soldering RAM gives me serious concerns about the direction they’re heading, so I can’t really recommend their products anymore.
If I ever need a new laptop, I’ll probably get a Framework.