Why buy a new PC?
I'm sitting here with a 6 year old PC that has a core i7 CPU, 24GB RAM, and dual SSDs. The memory and storage upgrades have made this system perform better than the day I bought it. It can handle Win10 and multiple apps with little effort.
I may upgrade to or build a new system this year, but if I'm honest about it, I really don't need to do that yet.