Key aspect here light user who
If the usage pattern continues to be same for next few years. answer is no, it doesn't make a difference
While the other answer has pointed out valid instances of certain apps occupying more RAM as as time rolls, IMO it is not very pertinent given that you are not multi tasking , But if you are using RAM hoggers like Facebook which nearly takes up 0.5 GB of RAM, it may result in sluggish performance if another hungry app is opened up
How much RAM does a phone need? gives an interesting take on current trend of high RAM phones and also mentions that Googlexe2x80x99s official minimum spec for a 64-bit phone (thatxe2x80x99s pretty much every phone these days) is 832 MB RAM, so, you are left with one GB of RAM for apps, even if Android OS is updated to 64 bit) and you retain your 2 GB RAM device - pretty much future proof !
Edit: Your chosen device OS is 32 bit and occupies 512 MB of RAM and if it is 64 bit it would require 832 MB of RAM , ( as per table it is dependent on screen size and pixel density- large in your case and pixel density is less than 300 dpi ). This size is only for the OS , radio (modem) is extra, which is not much anyway. Source : Page 56 of android Compatibility Definition
Bottom line, for your use, it shouldn't matter, since EMUI 7.0 occupies 0.5 GB and you are still left with 1.5 GB, which is plenty. Even if EMUI is upgraded, I doubt it would make a substantial difference