The entire system is based around Long Resting so they had better find a way to make it meaningful. Otherwise they need to stop making D&D video games or fundamentally change how things work in digital. They already went that way with the Camping Supplies, it's just not enough of a price tag to discourage spamming Long Rests. They just need to push further to find a good balance. Less food, more expensive supplies, random encounters.. whatever.
Interestingly, you are ignoring the fact that no DnD game has limited rests.
No matter how they do it, as long as there is no hard rest or time limit in the game, it cannot be limited whether you want it or not.
Neither of these things are liked by the players so it is highly unlikely that larian would want to do something like this.
And as for random meetings, there is no one who could discourage rests due to the fact that they are random, which means that in the worst case you can always load the game. Another thing is that they are usually so easy that whether or not you rested does not matter.
At worst, they can become irritating over time.
Even if Owlcat whose games are aimed at more hardcore RPG fans has decided to remove the limited rest, do you really think Larian will go for some serious restrictions?
