Levitation has no effect if gliding with elytra

Also while levitating you cannot activate the elytra.

@unknown because you need to jump while falling aka, downwards momentum.

But even when a negative levitation effect is applied (a.k.a. amplifier 128 or greater, which makes you fall instead of float), the elytra still won't activate after I press jump.

Cough MC-10755 Cough.

???
Completely unrelated

amplifier 128 or greater

That was a reply to you saying that.

But amplifier 128 for levitation DOES work. Try it for yourself. It makes you fall super-fast

Yet, it's not supported.

What do you mean? It's definitely supported, as it works correctly.
Still, we digress. You said activating the elytra requires downwards momentum. Levitation 128 obviously gives downwards momentum, but the elytra still refuse to be activated.

Unsupported as in "the formula works, but we don't fix any issues related to those values".

I dunno why Dinnerbone removed the limit to the effect command I don't want to chase "bugs" like these...

Also falling = downwards momentum, but downwards momentum =/= falling.

You said downwards momentum was needed for elytra to activate. Levitation 128 gives downwards momentum. Elytra still doesn't work.
It is unsupported, but it should be supported.

because you need to jump while falling aka, downwards momentum.

falling = downwards momentum, but downwards momentum =/= falling

I said you needed to fall.

but it should be supported.

It won't.

Falling = having downwards momentum while mid-air, right? So yes the player is falling if they have levitation 128 and mid-air.

but downwards momentum =/= falling

I'm going to stop this discussion right here.

Can confirm for MC 1.12.1.

Can confirm for 18w03b...

Confirmed for 1.13.1.