I pulled out the Gram scale and weighed some stuff..

Standard 27.5 x 2.25-2.4 tube,
Bontrager: 190 grams

My Plus bike tube, 27.5 x 2.8-3.25, (Note: This tube will stretch to fit a 4.0 fat tire)
Schwalbe: 210 grams

Stans 2 oz (59ml) Tire sealant
Empty bottle weight 12 grams,
Full Bottle weight 72 grams, therefore sealant weight Is 60 grams....

With me so far ?

You can check the math, feel free.

On my regular 27.5 bike I saved 130 grams per wheel.
On my Plus bike I saved 150 grams per wheel.

Remember this weight Is at the most critical place on any bike, It Is as far as possible from the axle and It Is Rotational mass and It Is 'UN-sprung weight'.

The Un-suspended weight savings formula In moto racing, 2 or 4 wheels Is simply this,
"For every pound of Un-sprung or rotational mass you remove from a car or bike you gain the same performance advantage as If you removed TWO pounds of static weight above the suspension. This Is very 'Old School' stuff.

Now look up the cost of a given mountain bike wheel set that Is 300 grams lighter than another,,, Yeah now you're starting to see the light right ? A pretty cheap hop up this tubeless thing Is me thinks...
And the science of how a tire works without a tube is a whole different hornets nest that ultimately leads to a bike that to list a few, Accelerates faster for a given rider watt out put.
Delivers less rolling resistance by running lower tire pressure, This allows a tire to deform over an obstacle and not bounce back and up at you as hard slowing you down less,,,get my drift yet ???

And self sealing punctures,, Hey and,
No more snake bite flats,, another plus.....
So I took .66 pounds off my bike but the performance gain Is the same as If I took 1.32 pounds off my bike..
That's the felt weight of my dropper post,,yeah I'll take that...