It really depends on your intended use. The Atom CPU is too slow for most things.
If you stay with 16.04, many apps will be lighter than they are in 18.04 due to library bloat, gtk2 vs gtk3, etc.
I am keeping all of my 32-bit only systems at 16.04 and will not be upgrading them. I expect them to be just about "used up" by 2021:slight_smile:
djb