Congratulations! New toys are always nice to have when starting a new year.
I think I've only had two entirely
new PCs in my life so far. (And one was an original IBM PC-XT!) All the others are Franken-PCs that mostly get put together using whatever I have lying around or on my parts shelf. They do get upgraded (and recycled) on a fairly continuous basis however. So while there's often something
recently "new" in any given machine, there's only been one other time I can remember when ALL the pieces were purchased new at the same time.
Enjoy your new PC!