Is 2015 iMac not enough - 8GB RAM?

Question

iMac

iMac 21'5 2015 MK442
!update - delete

Answer 1

In the operating system of the OS X family, memory management is different than in Windows. The lack of free memory is the norm.
I have Air i7 1.7 and the same 8 Gb of memory. Performance is more than satisfactory. All your "slowdowns" are disk problems. Install an SSD.

Answer 2

hardly enough for 4-5 years.
I think after 2 years maximum 3, it is worth changing completely.
well, everything is simple here -> there is money, you buy better right away, no -> you use what you have)