This frame weight is less than 1.5kg which is considered under the super light category of mountain bike frames. Any lesser than that would be carbon fibre or mix of alloy and carbon.
What I learn from the seller who sold me this frame, the previous owner upgraded to carbon fibre frame.
In my opinion, if you are able to get a reasonable price used super light frame which is still of good condition why not?
The balance you can use to spend on other items such as hubs, rims or a carbon handle bar.