Well, not really.
You keep coming back to a focus on weight and weight's impact on the spell working. You *directly* link weight and spell function... Too much weight based on char strength and spell ceases. So a 20int caster at 20 level casts feather fall on an 8 int gnome and a str 19 half-orc and each gets an abc lb sticky sack dropped on them and the gnomes feather falk can fail but the orcs can remain if the weight gain beats the gnome str based carry but within the orcs. (That seems what you are saying if it is not sorry)
I say feather fall itself is not affected by weight at all. It sets a drop rate for the creatures it targets. Period.
So the sticky sack and the strength of the gnome vs the orc has no effect.
However we both i believe agree there are other non-weight ways feather fall can be cancelled. One is becoming an illegal target (which, again have not looked up object v creature v dead interaction... It really seems a dangerously broad scope decidion that i would not make without a lot of research.)
So *if* becoming dead makes one not a valid feather fall target, then yes being crushed to death under a ship would trigger that. But so would becoming 1lb heavier if that 1lb was in the form of arrows that killed you or no weight if it was magic misdles that did so.
**So conflating that to try and make it serm like we are both applying a weight limit abd yours is stats based is more than a little misleading.**
You added the additional topic of being killed by arrows and then linked it in, not I, so... physician, heal thyself.
My point is that you have some weight limit, current set at the vague point of 'something less than 130 tons' (as that's the weight of the example ship) at which point feather fall becomes a death sentence. Sure, there's a semantic difference between the instant death due to crushing vice the moments more of life due to feather fall failing, but that's really beside the point -- how the spell fails isn't interesting to me.
What is interesting is that you quoted me and said that you have the spell work regardless of additional weight because you didn't see any point of adding an arbitrary set of additional rules to the spell that aren't needed, mostly because you didn't see where they'd come into play. I presented an example of exactly where they'd come into play with the airship, and immediately you agreed that, indeed, weight and feather fall would have an adverse interaction, thereby introducing an arbitrary set of additional rules to the spell based on weight. Granted, in your case that interaction is crushing death vice my interaction of the spell merely failing, but I'm mostly interested, at this point, in exploring the space in which your arbitrary interaction rules for feather fall exist. Mine are well defined, easy to explain to players (your max lift limit is the limit for how much you can carry before feather fall fails), and relies on existing rules. Where are your lines?
If it helps, I have some examples that might illuminate your thinking:
Case 1: there's a 1 ton weight chained to the ankles of your 3rd level caster. It's tossed off a 600' foot cliff, dragging you after. You cast feather fall. What happens?
Case 2: there's 1 ton of gold chains wrapped tightly around your 3rd level caster. You and the chains are tossed off a 600' cliff. You cast feather fall. What happens?
Case 3: same as case 1, but the weight is not 10 tons.
Case 4. Same as case 2, but the chains are magically enhanced to weigh 10 tons.
Case 5: same as 1, weight not 100 tons.
Case 6: same as 2, but weight is now 100 tons.
Case 7: same as 1, but weight is now 1 pound more than your maximum lift weight.
Case 8: same as 2, but weight is now 1 pound more than your maximum lift weight.