Although I can see where the logic is coming from and it's all true being that it's common when new cars are coming out and people have more choices, the instance with the i3 very unusual and what normally would be the case may not be relevant to the i3. Here's why.
Granted, the pricing of used i3's are based on a bunch of factors that are no different than other cars and therefore experiences price drops, there are a few things that are unique to the i3's in terms of timing. We won't experience this again:
EV's being new.
People weren't ready to commit, so they leased. I hear over 95% of i3's were leased. So when they all came off lease, they created a huge surge in available i3's. So many in fact that pricing on these from the dealer were better than private sales. By the way for anyone reading this, I believe a new flux of i3's just came off lease in the USA. There's 3x more i3's on the used market as of a couple weeks ago than a couple months ago. Back to the topic. Now that people are more familiar with EV's, there's less fear. Consumers will never be as fearful as they were 6 years ago.
The Tesla effect.
The "affordable" Tesla can only come out once and that's already happened. In 2018 before the base model 3 came out, everyone and their mom was waiting for one. It seemed like a lot of demand for EV's, but in reality there was none. All these people were sitting on their hands waiting for the release of it. So during the best time to get an i3 as far as prices were concerned, the demand was pretty much zero. Everyone (most) considering an EV wanted a model 3 or at least thought they did so they didn't move. They stuck with their reservation, transferred it, sold it, ditched it. Whatever the case, money never left their hands b/c the Model 3 wasn't out yet.
Now that the Model 3 is out, everyone who actually committed to it who wants one, got one. Not that they ever considered the i3, but they're in even less of a place to buy an i3.
Conclusion
We won't see the above scenarios repeat. I believe that we've already hit rock bottom on i3 prices. $11,200 is as cheap as it gets for it to be worth buying. BEV 2014. We may see these drop further over time of course as with all cars, but by then the cars will have too many miles (2014-2016 ones are already out of warranty) for it to be worth considering.
Even the first generation Nissan Leaf dropped to $5k at one point but jumped to $7k-8k with more miles than the ones sold for $5k.
The current pricing on i3's as I write this is low $23k-25k for a well optioned 2017 (94ah) REX with about 25-35k miles. Last year that figure was in the high $20's through $30-33k. It's dropped a bunch. Base 2016 Rex models can be had in the teens easily.
I have another article on here about how I don't think EV's will be replacing gas cars due to lack of education of the general public. I don't think that will change anytime soon. Anyone who's considering an i3 is already considering it. It's not the price that's holding them back so any changes in pricing aren't going to make them pull the trigger. As we i3 owners know, there's a lot to hate about the i3 (that we as owneres just happen to accept or adore). The car turns a lot of people off.
Ones already considering it may or may not make their move, but we won't see people all of a sudden interested in i3's. That doesn't mean that prices will drop any further. Some of these cars may literally just sit. I'd be surprised if we see optioned out 94ah i3's sell in the teens, but I suppose it could happen. Maybe in a few years but not within 3. I might lose that bet and I'm willing to take a loss, but I'm placing it here. Feel free to call me out on it in 3 years. If I'm wrong and you're in the Bay Area, I'll get you an bubble milk tea of your choice. First 5 people.