Ssd or hdd or fusion drive on Imac???

Question

macOS

is it true that imacs (even expensive ones) are slow with hdd or fusion drive? After all, 90% of imacs have these drives. Why are they expensive if they work slowly? How easy is it to replace with an ssd?

Answer 1

It is better to take an SSD even if it is a small volume (512 today). Replacing an HDD or Fusion Drive with an SSD in an iMac requires special skills, so such things should only be done at specialized service centers.
Fusion Drive is a hybrid of SSD and HDD. When using it, the system itself determines which files are often used and places them on the SSD part and which are rarely used on the HDD part. The system itself, as far as I remember, is placed immediately on the SSD part.