How many iOS versions do you think iPhone X will get?

so looked history of apple iphones since i'm new guy in zone )
i'm wondering how many ios versions take before iphone x presumed obsollete...
have:
iphone 2g - ios 1,2,3
iphone 3g - ios 2,3,4
iphone 3gs - ios 3,4,5,6
iphone 4 - ios 4,5,6,7
iphone 4s - ios 5,6,7,8,9
iphone 5 - 6,7,8,9,10
iphone 5c - 7,8,9,10
iphone 5s - 7,8,9,10,11

first 2 iphones had 2 main updates, next 2 had 3 main updates , newer ones had 4 main updates (except iphone 5c)...so judging iphone x ios 12,13,14 , 15...

, have question? iphone x , 8/8plus have same lifespan? simillar iphone 5c , iphone 5s?

 

looks 11, 12, 13, 14, 15 life span on paper actual performance later on anyone's guess.

iphone 4 became practically unusable once upgraded 7. thankfully had got 5s then. 5s on 10.3.3 when traded in few weeks ago , still delivering performance. guess escaped throttle treatment 6, 6s phones got.

 

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