Will A New PC Be Worth It?

General Discussion
4

  1. Older hardware generally suits Qubes OS better. If you run Qubes OS on too new PC, many problems may occur.

  2. If you have ever felt uncomfortable with small memory size, get a bigger one. I assume that you know when your Qubes OS is short of memory.

  3. It all depends on how you are using the storage. A student major in CS that keeps compiling different versions of linux kernel and plays with docker containers uses up storage way faster than a normal user who is browsing internet and using libreoffice for daily work.

Anyway, considering that your memory is DDR4, I would suggest old hardware - just boost your memory up to 32GB or 64GB (boost your memory if you ever felt short of memory) and that should help a great deal. Aside from that, a new machine improve quality of life only if your brand new CPU cost less electricity; however:
(1) new Intel CPU support S3 sleep poorly, so if you are user of “suspend” then think twice before choosing very new Intel CPU;
(2) new hardware brings new hardware issues; it takes at least around 2 years to make Qubes OS support one set of new hardware well.