I choose to translate “Enduro” as mountain-biking at a non-race speed. Going up and going down. Like, what I do. (and I suspect most others on here do).
You got it backwards. Enduro is normal mountain biking (eg riding a section of trail) done against the clock.
Because its done against the clock you couldn’t possibly stop to put your saddle up and down so you need a dropper, that’s step 1
Step 2, you need wider bars and a shorter stem, no one is sure why but its something to do with cockpits apparently.
Step 3, You need to throw away half you gears and only have a single chain ring, then find a way of keeping the chain on now that it falls off all the time.
Step 4, You need new tyres because the tyres you used to ride these bits of trail on are useless now that its an actual race. You need tyres with predictable grip and low rolling resistance, obviously.
Step 5. 650b, natch