It’s not just about upgrading. It’s also about being able to repair your computer. RAM likes to go bad and on a normal PC, you can replace it easily. Buy a cheap stick, take out the old RAM, put in the new one and you’ll have a working computer again. Quick & easy and even your grandpa is able to run Memtest and do a quick switch. But if you solder down everything, the whole PC becomes electronic waste as most people won’t be able to solder RAM.
WordPerfect really comes from a different time. Good look reading the stuff from your iOS notes app that saves everything somewhere in the cloud and that has no export option in 10 years.