I am currently looking for a new 14" notebook and I'm choosing between the Dell E7470 and the Lenovo T460s. (Unfortunately I cannot post links to these due to <10 reputation.)
Other differences aside, I can see that
the Dell E7470 has two memory banks and therefore supports a dual-channel configuration, but although it can accommodate a PCIe NVMe SSD too, it will run at half of the PCIe bandwidth.
the Lenovo T460s comes with choices of PCIe NVMe SSDs, but has 4 GB of RAM soldered, so if I add more than another 4 GB of RAM, then it will not run in a dual-channel configuration.
Which one would be more important for overall performance, dual-channel memory or an NVMe SSD at the full PCIe bandwith?
My performance requirements are not that high, just some Java and PHP software development and running virtual machines, but I would like to have something that will still be sufficient in a few years. (My current notebook is nearly 10 years old!)