The iPhone X is only a year old, has most of the latest features, and is still quite powerful. For most users there isn't a strong compelling reason to upgrade.
From a performance standpoint, there is a slight improvement, however, most users will not notice much of a difference. It might be worthwhile for hardcore gamers though. In addition, the added 512GB storage option may be compelling enough to upgrade.
In terms of features, the only feature lacking on the iPhone X is the dual-sim support. For individuals who need multiple lines for business or travel needs, an upgrade may be worthwhile.
Finally, a big reason to upgrade is the extra screen size on the iPhone XS Max. If screen size is important to you, then it may be worthwhile.
Should you decide to make the switch, you can trade in your iPhone with us.
Did you know, you can purchase a high quality certified used devices from us and save some money. Click the link to visit our store to buy used iPhones.