Bitcoin has ReplaceByFee and CheckLockTimeVerify.
When will Dash inherit RBF and CLTV?
Never. RBF is a total shit idea slammed into the code without thinking of the consequences or by consensus by your pimple-faced god Peter Todd and his ilk.
Oh goody. Let the sour grape harvest festival begin!

Cue the Duffsplantions of why RBF is undesirable because of The Todd's complexion.
And what of CLTV? Let me guess, payment channels are bad 'Because Acne.'
Dash is just Too Good for those icky sidechains, am I right? As if anyone would trust Confidential Transactions! You can't even see the amount transferred, so how do you know someone isn't cheating?
Dash takes 20+ hours to mix coins, Lightning may do it ~instantly. I can see why you'd want to FUD such overwhelming competition.