It doesn't stop being magic just because you know how it works.

Elves are wonderful. They provoke wonder.
Elves are marvellous. They cause marvels.
Elves are fantastic. They create fantasies.
Elves are glamorous. They project glamour.
Elves are enchanting. They weave enchantment.
Elves are terrific. They beget terror.
The thing about words is that meanings can twist just like a snake, and if you want to find snakes look for them behind words that have changed their meaning.
No one ever said elves are nice.
Elves are bad.

It's still magic even if you know how it's done.

The place where the story happened was a world on the back of four elephants perched on the shell of a giant turtle. That's the advantage of space. It's big enough to hold practically anything, and so, eventually, it does.
People think that it is strange to have a turtle ten thousand miles long and an elephant more than two thousand miles tall, which just shows that the human brain is ill-adapted for thinking and was probably originally designed for cooling the blood. It believes mere size is amazing.
There's nothing amazing about size. Turtles are amazing, and elephants are quite astonishing. But the fact that there's a big turtle is far less amazing than the fact that there is a turtle anywhere.

Amazin'.' he said again. 'He just looks as though he's thinking, right?'
'Er...yes.'
'But he's not actually thinking?'
'Er...no.'
'So...he just gives the impression of thinking but really it's just a show?'
'Er...yes.'
Just like everyone else, then really,' said Ridcully

Any sufficiently advanced technology is indistinguishable from magic.