I'm afraid the reality is that finding a laptop without at least some of the memory soldered on is increasingly difficult. Some T series Thinkpads prior to 2019

I'm afraid the reality is that finding a laptop without at least some of the memory soldered on is increasingly difficult. Some T series Thinkpads prior to 2019 did but that ship has sailed and there were no AMD T series Thinkpads prior to May of 2019. So installing a matched set is not an option in the T495. One of the great things about the T series of Thinkpads is that access to replace memory and storage is quick and easy unlike many modern laptops. Another advantage is that they are heavily documented and have a vibrant community around them. This means determining the memory specs needed to match the soldered-on memory is a rather trivial exercise. If any one is looking to purchase a T495 matching the soldered-on memory means using a PC4-19200 CL17 unbuffered non-ECC sodimm. You should be able to find a good brand module for about 1/5th of what Lenovo wants to factory install the additional memory.